Google Charts axis start

Below is url that chart I am using.

http://chart.apis.google.com/chart?cht=lc&chco=99C754&chs=400x150&chds=20,1&chd=t:1.0,1.0,1.0,1.0,1.0&chxt=x,y&chxl=0:|12/07/09|12/14/09|12/21/09|12/28/09|01/04/10&1:1|10|20&chxr=1,20,0,10&chls=2&chg=25,100,1,2&chm=o,54C7C5,0,-开发者_Go百科1,5&chxtc=1,15|0,15

I want to start y-axis from 1 but in my chart is started from 0.

please help me

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little look at google show :

Axis Range chxr : You can specify the range of values that appear on each axis independently, using the chxr parameter. Note that this does not change the scale of the chart elements, only the scale of the axis labels. If you want to make the axis numbers describe the actual data values, set and to the lower and upper values of your data format range, respectively. See Axis Scaling for more information.

You must make an axis visible using the chxt parameter if you want to specify its range.

To specify custom axis values, use the chxl parameter.

http://code.google.com/intl/iw/apis/chart/docs/gallery/bar_charts.html#axis_range