function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2013', 4],
    ['1978', 4],
    ['1973', 5],
    ['1971', 8],
    ['1953', 14],
    ['1924', 11],
    ['1918', 4],
    ['1912', 4],
    ['1910', 5],
    ['1907', 48],
    ['1906', 8],
    ['1900', 9],
    ['1883', 43],
    ['1876', 4],
    ['1851', 11],
    ['Other (46)', 73]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=255)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerYear', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerYear'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerYear);