function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 305],
    ['2021', 158],
    ['2020', 477],
    ['2019', 172],
    ['2018', 179],
    ['2017', 105],
    ['2016', 718],
    ['2015', 142],
    ['2014', 203],
    ['2012', 122],
    ['2011', 108],
    ['2010', 326],
    ['2008', 93],
    ['2007', 332],
    ['1999', 273],
    ['Other (39)', 674]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=4387)',
    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);