function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2022', 512],
    ['2021', 555],
    ['2020', 458],
    ['2019', 1795],
    ['2018', 1240],
    ['2017', 2765],
    ['2016', 1260],
    ['2015', 596],
    ['2014', 515],
    ['2013', 827],
    ['2011', 670],
    ['2009', 701],
    ['2005', 10229],
    ['1993', 5955],
    ['1982', 5376],
    ['Other (166)', 3496]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=36950)',
    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);