function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 680],
    ['2022', 698],
    ['2021', 1015],
    ['2020', 186],
    ['2018', 539],
    ['2017', 95],
    ['2016', 189],
    ['2015', 52],
    ['2014', 319],
    ['2013', 138],
    ['2012', 101],
    ['2011', 54],
    ['2007', 1278],
    ['1976', 561],
    ['1956', 229],
    ['Other (67)', 360]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=6494)',
    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);