year CO2 change ---- ------ in CO2 2000 369.55 ------ 2001 371.14 1.59 2002 373.28 2.14 2003 375.80 2.52 2004 377.52 1.72 2005 379.80 2.28 10 year 2006 381.90 2.10 average 2007 383.79 1.89 change 2008 385.60 1.81 in CO2 2009 387.43 1.83 ------- 2010 389.90 2.47 2.04 2011 391.65 1.75 2.05 2012 393.85 2.20 2.06 2013 396.52 2.67 2.07 2014 398.65 2.13 2.11 2015 400.83 2.18 2.10 2016 404.24 3.41 2.23 2017 406.55 2.31 2.28 2018 408.52 1.97 2.29 2019 411.44 2.92 2.40 2020 414.03 2.59 2.41 (2020 concentration projected by DAB from 11 months of ftp://aftp.cmdl.noaa.gov/products/trends/ )