function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2016', 3],
    ['2007', 38],
    ['2005', 6],
    ['1995', 3],
    ['1967', 7],
    ['1945', 3],
    ['1936', 4],
    ['1926', 3],
    ['1920', 4],
    ['1903', 3],
    ['1899', 10],
    ['1894', 2],
    ['1877', 2],
    ['1852', 2],
    ['1819', 4],
    ['Other (31)', 38]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=132)',
    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);