function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2007', 4],
    ['1995', 4],
    ['1990', 5],
    ['1983', 5],
    ['1982', 6],
    ['1980', 4],
    ['1979', 4],
    ['1975', 5],
    ['1973', 4],
    ['1972', 4],
    ['1969', 4],
    ['1964', 6],
    ['1960', 6],
    ['1938', 5],
    ['1934', 9],
    ['Other (46)', 78]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=153)',
    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);