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Atmospheric CO2 data and trend

  

   Decade                 Total Increase        Annual Rate of Increase

2003 –  2012              20.74 ppm                     2.07 ppm per year 

1993 –  2002               16.73 ppm                     1.67 ppm per year 

1983 –  1992                15.24 ppm                     1.52 ppm per year 

1973 –  1982               13.68 ppm                     1.37 ppm per year 

1963 –  1972                 9.00 ppm                     0.90 ppm per year 

SOURCE INFO: HERE

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