function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2017', 5],
    ['2011', 301],
    ['1891', 2],
    ['1855', 2],
    ['1850', 1],
    ['1849', 1],
    ['1847', 2],
    ['1846', 2],
    ['1840', 1],
    ['1827', 2],
    ['1825', 1],
    ['1820', 1],
    ['1818', 1],
    ['1816', 2],
    ['1810', 1],
    ['Other (14)', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=339)',
    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);