function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 160],
    ['2022', 249],
    ['2021', 46],
    ['2020', 83],
    ['2019', 23],
    ['2018', 79],
    ['2017', 86],
    ['2016', 31],
    ['2015', 109],
    ['2014', 70],
    ['2011', 30],
    ['2007', 155],
    ['2001', 28],
    ['1940', 37],
    ['1753', 59],
    ['Other (66)', 293]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=1538)',
    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);