谷歌泡泡图填充

Question

使用谷歌气泡图时出现气泡图表偏离轴的问题。

任何想法如何添加间距，或更改轴刻度以容纳额外的空间？

你可以看到我在这里谈论的一个例子： http://jsfiddle.net/k77bp25g/2/

function drawSeriesChart() {

  var data = google.visualization.arrayToDataTable([
    ['ID', 'Life Expectancy', 'Fertility Rate', 'Region',     'Population'],
    ['CAN',    0,              1.67,      'North America',  933739900],
    ['DEU',    79.84,              1.36,      'Europe',         933739900]
  ]);

  var options = {
    title: 'Correlation between life expectancy, fertility rate and population of some world countries (2010)',
    hAxis: {title: 'Life Expectancy'},
    vAxis: {title: 'Fertility Rate'},
    bubble: {textStyle: {fontSize: 11}}
  };

  var chart = new google.visualization.BubbleChart(document.getElementById('series_chart_div'));
  chart.draw(data, options);
}