[
    {
        "Id": 1,
        "Contribution": 800
    },
    {
        "Id": 2,
        "Contribution": 2400
    },
    {
        "Id": 3,
        "Contribution": 4800
    },
    {
        "Id": 4,
        "Contribution": 8000
    },
    {
        "Id": 5,
        "Contribution": 12000
    }
]