Year	constant 2010 US$
1991	24576.8775721642
1992	27978.7551146514
1993	26198.3700666114
1994	28044.7035811658
1995	30601.0023142423
1996	32880.5738497861
1997	34291.1033311077
1998	36721.7128137839
1999	39605.5281625773
2000	39088.7032167532
2001	37863.9966142222
2002	38982.311823465
2003	31306.5380983796
2004	41686.1410948396
2005	41203.9318367037
2006	40009.4671773688
2007	42190.6023749539
2008	54868.5016114358
2009	55158.0406192736
2010	53610.9641554137
2011	55707.6663839118
2012	50782.5795721439
2013	47339.4470055248
2014	59053.6387770534
2015	61161.2270105059
2016	50930.6058871793
2017	60358.5905974344
2018	62855.1037878538