function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2019', 10],
    ['2014', 7],
    ['1979', 3],
    ['1966', 4],
    ['1964', 4],
    ['1952', 3],
    ['1947', 8],
    ['1945', 10],
    ['1931', 11],
    ['1930', 6],
    ['1923', 3],
    ['1892', 3],
    ['1887', 5],
    ['1881', 2],
    ['1873', 2],
    ['Other (35)', 46]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=127)',
    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);