function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2010', 4],
    ['1992', 2],
    ['1970', 2],
    ['1966', 2],
    ['1962', 4],
    ['1955', 3],
    ['1948', 2],
    ['1930', 2],
    ['1919', 2],
    ['1917', 6],
    ['1912', 2],
    ['1911', 7],
    ['1903', 2],
    ['1899', 8],
    ['1861', 5],
    ['Other (25)', 25]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=78)',
    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);