function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2017', 9],
    ['2014', 3],
    ['2008', 2],
    ['1993', 2],
    ['1991', 8],
    ['1990', 2],
    ['1988', 2],
    ['1937', 2],
    ['1933', 2],
    ['1931', 10],
    ['1924', 4],
    ['1921', 3],
    ['1916', 2],
    ['1912', 2],
    ['1854', 5],
    ['Other (25)', 27]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=85)',
    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);