function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 139],
    ['2022', 54],
    ['2021', 363],
    ['2020', 73],
    ['2019', 41],
    ['2018', 85],
    ['2017', 51],
    ['2016', 56],
    ['2015', 74],
    ['2014', 2372],
    ['2013', 87],
    ['2009', 67],
    ['1901', 40],
    ['1900', 98],
    ['1898', 34],
    ['Other (34)', 148]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=3782)',
    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);