time total_annual_GPP(PgC/yr)
2000.5 111.312208
2001.5 110.793791
2002.5 109.749250
2003.5 110.763338
2004.5 111.981669
2005.5 108.951222
2006.5 111.222398
2007.5 110.950703
2008.5 110.660120
2009.5 110.799986
2010.5 111.029159
2011.5 112.321916
2012.5 110.374960
2013.5 111.115109
2014.5 112.181982
2015.5 110.911660