Year	current US$
1970	1689999.9678134916
1971	1629999.987781047
1972	1730000.033974646
1973	1820000.0077486031
1974	3449999.9880790696
1975	2149999.961256981
1976	2159999.966621398
1977	3299999.952316284
1978	2860000.0143051157
1979	2689999.967813492
1980	1679999.977350235
1981	4129999.905824665
1982	3709999.9487400074
1983	4729999.959468837
1984	4409999.966621396
1985	5999999.999999995
1986	6029999.971389769
1987	7550000.0119209215
1988	4929999.995976683
1989	6560000.061988831
1990	9300000.04917383
1991	10449999.935925012
1992	11169999.938458199
1993	13000000.111758705
1994	11070000.126957884
1995	19069999.784231193
1996	11970000.088214876
1997	14269999.995827675
1998	14299999.922513971
1999	14630000.010132793
2000	15190000.236034391
2001	11579999.908804886
2002	11530000.105500221
2003	13410000.056028368
2004	10709999.985992901
2005	9160000.085830696
2006	7190000.176429752
2007	7489999.890327457
2008	4109999.954700469