function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 842],
    ['2022', 1056],
    ['2021', 887],
    ['2019', 1237],
    ['2018', 1345],
    ['2017', 1548],
    ['2016', 1693],
    ['2015', 1539],
    ['2014', 1600],
    ['2013', 2503],
    ['2012', 1573],
    ['2011', 1167],
    ['2010', 830],
    ['2009', 960],
    ['2006', 1572],
    ['Other (130)', 3658]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=24010)',
    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);