function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['1907', 7],
    ['1905', 5],
    ['1901', 5],
    ['1900', 20],
    ['1898', 9],
    ['1893', 3],
    ['1891', 5],
    ['1889', 8],
    ['1887', 4],
    ['1886', 11],
    ['1885', 6],
    ['1883', 7],
    ['1881', 6],
    ['1859', 11],
    ['1858', 5],
    ['Other (13)', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=131)',
    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);