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<!-- based on http://bl.ocks.org/mbostock/3885304 -->

<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script>

  var create_chart = function(data, c_width){
    $("#chart").html("");

    var margin = {top: 20, right: 20, bottom: 30, left: 40},
        width = c_width - margin.left - margin.right,
        height = 500 - margin.top - margin.bottom;

    var x = d3.scale.ordinal()
        .rangeRoundBands([0, width], .1);

    var y = d3.scale.linear()
        .range([height, 0]);

    var xAxis = d3.svg.axis()
        .scale(x)
        .orient("bottom");

    var yAxis = d3.svg.axis()
        .scale(y)
        .orient("left")
        .ticks(10, "");

    var svg = d3.select("#chart").append("svg")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom)
      .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    x.domain(data.map(function(d) { return d.label; }));
    y.domain([0, d3.max(data, function(d) { return d.count; })]);

    svg.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + height + ")")
        .call(xAxis);

    svg.append("g")
        .attr("class", "y axis")
        .call(yAxis)
      .append("text")
        .attr("transform", "rotate(-90)")
        .attr("y", 6)
        .attr("dy", ".71em")
        .style("text-anchor", "end")
        .text("Counts");

    svg.selectAll(".bar")
        .data(data)
      .enter().append("rect")
        .attr("class", "bar")
        .attr("x", function(d) { return x(d.label); })
        .attr("width", x.rangeBand())
        .attr("y", function(d) { return y(d.count); })
        .attr("height", function(d) { return height - y(d.count); })
        .append("title")
        .text(function(d) {
         return d.count;});

  };

</script>
<script>
  var model = {{chart_data|safe}};
  var c_width = {{chart_width|safe}};
  var max = {{chart_max|safe}};
  create_chart(model, c_width);
</script>