Highcharts: Area chart: fill in space between 0 and first point - highcharts

Question

http://jsfiddle.net/gabrielesandoval/efHq7/
Is there a way to fill in the gap between the y-axis and the first point. The first point on my chart should be "25 years" and i would like the area between 0 and 25 to be filled in as well. Even if the tooltip doesn't work for that point, I would just like to visually show that the values between 0 and the first point.
I tried adding a point with a x value of zero but that didnt work. The only area charts I have seen where there is no gap between the two axis and the area are examples where the chart is inverted. Is there a proper way to do this?
Current Code:
$(function () {
$('#container').highcharts({
chart: {
type: 'areaspline'
},
title: {
text: 'Monthly Comparison'
},
subtitle: {
text: '1 vs 2'
},
xAxis: {
min: 0,
categories: [0, '25 years', '30 years', '35 years', '40 years', '45 years']
},
yAxis: {
labels: {
formatter: function() {
return '$' + this.value;
}
},
min: 0,
title: {
text: 'Cost'
}
},
tooltip: {
shared: true,
valuePrefix: '$'
},
credits: {
enabled: false
},
legend: {
enabled: false
},
plotOptions: {
area: {
lineWidth: 1,
marker: {
enabled: false
},
shadow: false,
states: {
hover: {
lineWidth: 1
}
}
}
},
series: [{
type: 'area',
name: 'series1',
data: [['',60],['25 years',60], ['30 years',60], ['35 years',60], ['40 years',60], ['45 years',60]]
}, {
type: 'area',
name: 'series2',
data: [['',90], ['25 years',100], ['30 years',175], ['35 years',300], ['40 years',400], ['45 years',400]]
}]
});
});

Answer 1

You should set minPadding/maxPadding as 0, but these parameters doesn't work with categories. So you need to use numeric xAxis, instead of categories.