Year	US Dollars
1995	13700
1996	14390
1997	15340
1998	16080
1999	17140
2000	18080
2001	19030
2002	20210
2003	20980
2004	22550
2005	23800
2006	25530
2007	27060
2008	28940
2009	27100
2010	27510
2011	28580
2012	28640
2013	29400
2014	30570
2015	30520
2016	31810
2017	33980