Year	constant 2015 US$
2006	96176.30189731599
2007	96280.24833718476
2008	93166.31677467313
2009	84026.97277158132
2010	79519.84376980599
2011	78393.73628435502
2012	77448.50982556127
2013	76617.54337400144
2014	76872.58091789132
2015	77295.8456647776
2016	78077.43365327173
2017	78883.28208237367
2018	80597.70863776036
2019	82170.59302679128
2020	76733.55605197094
2021	79522.61080858695
2022	82929.30379942266