function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2016', 16],
    ['2014', 105],
    ['2012', 11],
    ['1914', 21],
    ['1910', 23],
    ['1900', 11],
    ['1893', 11],
    ['1873', 30],
    ['1870', 8],
    ['1859', 8],
    ['1856', 25],
    ['1855', 19],
    ['1854', 29],
    ['1853', 9],
    ['1849', 13],
    ['Other (40)', 106]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=445)',
    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);