I am getting below json data in jsondata field:

HTML Code:
{
    "data": [{
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 1012620
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 1003278
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 457615
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 660982
        },
        {
            "Part": "other",
            "ProductionCounts": 1571985
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 899308
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 1597379
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 0
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 0
        },
        {
            "Part": "other",
            "ProductionCounts": 2196254
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 652255
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 118862
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 314481
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 0
        },
        {
            "Part": "other",
            "ProductionCounts": 2106794
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 799850
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 787854
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 572825
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 586796
        },
        {
            "Part": "other",
            "ProductionCounts": 1699898
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 1098905
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 849032
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 680223
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 676436
        },
        {
            "Part": "other",
            "ProductionCounts": 2126999
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 1182160
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 1096124
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 307723
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 0
        },
        {
            "Part": "other",
            "ProductionCounts": 2339177
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 442606
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 1188054
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 232819
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 437088
        },
        {
            "Part": "other",
            "ProductionCounts": 2123290
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 804017
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 701323
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 658470
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 400048
        },
        {
            "Part": "other",
            "ProductionCounts": 1453187
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 1976932
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 179347
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 493326
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 366893
        },
        {
            "Part": "other",
            "ProductionCounts": 1537608
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 1220153
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 651824
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 543190
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 0
        },
        {
            "Part": "other",
            "ProductionCounts": 3195743
        }]
    },
    {
        "data": [{
            "Part": "1.75 L ICON (Glass)",
            "ProductionCounts": 0
        },
        {
            "Part": "1.75 L Marg Mix (PET)",
            "ProductionCounts": 0
        },
        {
            "Part": "1.75 L Authentics (PET)",
            "ProductionCounts": 0
        },
        {
            "Part": "1.0 L Margarita Mix / PET",
            "ProductionCounts": 0
        },
        {
            "Part": "other",
            "ProductionCounts": 0
        }]
    }],
    "dateArray": ["2011-01-01",
    "2011-02-01",
    "2011-03-01",
    "2011-04-01",
    "2011-05-01",
    "2011-06-01",
    "2011-07-01",
    "2011-08-01",
    "2011-09-01",
    "2011-10-01",
    "2011-11-01"],
    "xAxis":"Part",
    "yAxis":"ProductionCounts",
    "interestingMoments": []
}
I am getting the xAxis value in one variable like
var xAxis = jsonData.xAxis;
Value is coming fine in variable but when I am trying to access value like this.
jsonData.data[0].data[0].xAxis -- > it is giving me undefined instead of correct value.

What I am doing wrong here? What should be the correct method to access that value ?