var data= [{
        "salary": 0,
        "ratio":3
    }, {
        "salary": 1500,
        "ratio": 3
    }, {
        "salary": 1500,
        "ratio": 10
    }, {
        "salary": 4500,
        "ratio": 10
    }, {
        "salary": 4500,
        "ratio": 20
    }, {
        "salary": 9000,
        "ratio": 20
    }, {
        "salary": 9000,
        "ratio":25
    }, {
        "salary": 35000,
        "ratio": 25
    }, {
        "salary": 35000,
        "ratio": 30
    }, {
        "salary": 55000,
        "ratio": 30
    }, {
        "salary": 80000,
        "ratio": 35
    }, {
        "salary": 80001,
        "ratio":45
    }, ];

var chart = AmCharts.makeChart("chartdiv", {
    "type": "serial",
    "titles":[{"text":"Step Line Chart"}],
 
    "dataProvider":data,
    "ratioAxes": [{
        "axisAlpha": 0,
        "position": "left"
    }],
    "graphs": [{
        "id":"g1",
        "balloonText": "[[category]]<br><b>[[ratio]] C</b>",
        "type": "step",
        "bullet":"square",
        "bulletAlpha":0,
        "bulletSize":0,
        "bulletBorderAlpha":0,    "lineThickness":2,
        "valueField": "ratio"
    }],

    "chartCursor": {
        "fullWidth":true,
        "categoryBalloonDateFormat": "YYYY",
        "cursorAlpha": 0.0,
        "graphBulletAlpha":1

    },
 
    "categoryField": "salary",
    "categoryAxis": {
 
        "parseDates": false,
        "gridAlpha": 0
    },

});