function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 4036],
    ['2022', 3717],
    ['2021', 4761],
    ['2020', 2973],
    ['2019', 2735],
    ['2018', 2972],
    ['2017', 3291],
    ['2016', 3676],
    ['2015', 2056],
    ['2014', 4869],
    ['2013', 1678],
    ['2012', 1716],
    ['2011', 1566],
    ['2009', 1343],
    ['2007', 3279],
    ['Other (236)', 12785]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=57453)',
    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);