function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 222],
    ['2022', 157],
    ['2021', 114],
    ['2020', 24],
    ['2018', 101],
    ['2017', 179],
    ['2016', 42],
    ['2014', 63],
    ['2013', 39],
    ['2009', 135],
    ['2007', 147],
    ['1978', 22],
    ['1976', 36],
    ['1953', 17],
    ['1753', 60],
    ['Other (48)', 222]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=1580)',
    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);