Year	constant 2015 US$
1991	12197.099003495714
1992	12357.565196818103
1993	12447.129031921431
1994	12279.2618398896
1995	12052.226133203116
1996	12295.833220156217
1997	12158.047337693766
1998	12298.85203346339
1999	12105.796264622746
2000	11434.992871755641
2001	11960.670209014525
2002	12257.39798651066
2003	11940.13386284982
2004	12843.821089949472
2005	13125.943491342803
2006	13552.581762443457
2007	14138.078372071102
2008	14469.55634464533
2009	14448.30449296341
2010	14873.022872741474
2011	15095.461005489678
2012	15580.335351499845
2013	15603.010712403378
2014	15684.310940885594
2015	15375.77008120999
2016	15361.862810939603
2017	15680.036241141728
2018	15584.574993157143
2019	16120.113831529949
2020	16182.814838803233
2021	16348.269585463428
2022	16878.22607050122