Testing the Climate Change Index

To show that my Climate Change Index is not a completely without value, I give a few examples of its merit:

COMPARISON WITH OFFICIAL CLIMATE CHANGE DATA
"The global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the last 100 years." source: http://en.wikipedia.org/wiki/Global_warming

This measurement was arrived at in the report of the IPCC, using error corrected data of tens of thousands of weather stations over 100 years.

For comparison, here are the latest available full month data from my calculations and sampling of 130 stations. (Older data are archived in DivX movie format and can be downloaded from here: http://stage6.divx.com/Climate-Change).
My results show a temperature rise of +0.71 to +0.73°C.

The difference to the official value of 0.74° Celsius is 1% to 3%, a mean difference of 2%, which I think is amazingly close.