not really because I am making chart URL,
but you can test the data
https://chart.googleapis.com/chart?chs=550x400&chds=0,3&chxt=y&chts=000000,15&cht=bhs&chd=t:
2,-1,-1,-1,-1,-1|
-1,2,-1,-1,1,-1|
-1,-1,2,1,-1,-1|
1,-1,-1,2,-1,-1|
-1,1,-1,-1,2,1|
-1,-1,-1,-1,-1,-1|
-1,-1,-1,-1,-1,-1|
-1,-1,-1,-1,-1,-1|
-1,-1,-1,-1,-1,1|
-1,-1,1,-1,-1,1
&chco=
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D|
A91E2A,E95251,E41D38,E24733,E28B50,EEC41A,EFD050,5C573D,686450,A7AF5D
&chbh=r,.1,.5&chm=N,000000,0,,12,,c|N,000000,1,,12,,c|N,
000000,2,,12,,c|N,000000,3,,12,,c|N,000000,4,,12,,c|N,000000,5,,12,,c|
N,000000,6,,12,,c|N,000000,7,,12,,c|N,000000,8,,12,,c|N,
000000,9,,12,,c&chxl=0:|Option+6|Option+5|Option+4|Option+3|Option+2|
Option+1&chdl=Rate+1|Rate+2|Rate+3|Rate+4|Rate+5|Rate+6|Rate+7|Rate+8|
Rate+9|No+Answer
now you can read it,