Year	constant 2010 US$
1991	8728.59279792836
1992	8858.05218701458
1993	9018.01442155369
1994	9177.77771183861
1995	9361.61346916868
1996	9364.74544316181
1997	9452.48409383306
1998	9605.43466456945
1999	9935.79113332275
2000	10301.9111625503
2001	9891.34031654064
2002	9532.78518506582
2003	9169.12414546461
2004	9083.37131843331
2005	9199.57200393658
2006	9532.8953100479
2007	9923.70511969622
2008	10209.8516913632
2009	10220.8420611889
2010	10332.9403005845
2011	10990.7340639675
2012	8931.51816145532
2013	9220.05831147052
2014	9533.24690986158
2015	9673.19800718702
2016	9582.05983491544
2017	9540.21528284534
2018	9580.19956262633