function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 553],
    ['2022', 1222],
    ['2021', 1890],
    ['2020', 161],
    ['2018', 205],
    ['2014', 254],
    ['2013', 227],
    ['2012', 130],
    ['2007', 472],
    ['2001', 283],
    ['1980', 240],
    ['1972', 169],
    ['1956', 138],
    ['1911', 120],
    ['1753', 191],
    ['Other (92)', 1695]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=7950)',
    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);