function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2017', 44],
    ['2014', 19],
    ['2009', 17],
    ['2008', 19],
    ['1990', 28],
    ['1987', 18],
    ['1985', 18],
    ['1983', 16],
    ['1977', 17],
    ['1970', 47],
    ['1960', 19],
    ['1954', 16],
    ['1940', 23],
    ['1938', 24],
    ['1934', 35],
    ['Other (87)', 547]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=907)',
    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);