function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2017', 12],
    ['2009', 6],
    ['2008', 13],
    ['2007', 18],
    ['1986', 6],
    ['1985', 8],
    ['1984', 6],
    ['1976', 5],
    ['1974', 6],
    ['1970', 12],
    ['1969', 6],
    ['1961', 4],
    ['1960', 6],
    ['1958', 5],
    ['1942', 4],
    ['Other (54)', 93]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=210)',
    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);