Year	constant 2010 US$
1995	23896.6468684422
1996	24985.8804637131
1997	25190.5523595719
1998	26001.577500079
1999	25141.0010024194
2000	25728.6517874823
2001	26610.2958535333
2002	27678.9745068285
2003	27668.8482109438
2004	28319.9061707469
2005	29205.0596426667
2006	30254.0723467721
2007	30207.3080467704
2008	30597.5452059552
2009	29855.8310605734
2010	29838.9117524063
2011	30376.7838047602
2012	29561.7819292273
2013	30154.514152025
2014	29606.2445026804
2015	29365.4486478783
2016	29446.2892105064
2017	30761.5985227411
2018	31967.8252260824