Year	US Dollars
1962	1540
1963	1740
1964	2050
1965	2440
1966	2980
1967	3110
1968	2790
1969	2490
1998	29110
1999	30400
2000	31540
2001	30710
2002	30930
2003	33710
2004	42020
2005	50680
2006	53620
2007	61930
2008	50140
2009	42010
2010	36530
2011	37750
2012	40750
2013	47060
2014	48150
2015	49960
2016	54970
2017	60830