Year	constant 2015 US$
1995	8138.137855562751
1996	8758.49722184816
1997	7649.847150758195
1998	7436.76780984411
1999	8021.350157851749
2000	9219.585247609994
2001	8369.08508476
2002	10818.651299059218
2003	8890.150818177226
2004	9182.975578991218
2005	9339.841782310003
2006	8695.008665785486
2007	8847.72303847415
2008	10232.832896437849
2009	8857.931972738355
2010	9526.7556946267
2011	10601.042773397563
2012	10210.008258855134
2013	10177.825637265734
2014	9061.836731105263
2015	13931.131263509722
2016	19399.89827937647
2017	15879.329635508298
2018	19019.40996434672
2019	23346.45716473689
2020	25455.659964288305
2021	22812.46601484955
2022	20531.086228674172