Year	Dollars
1971-01-01	106579704.590842250
1972-01-01	339737168.201068880
1973-01-01	4180846805.998878500
1974-01-01	9084950154.225967400
1975-01-01	3097445200.308147400
1976-01-01	3746082062.264658000
1977-01-01	3904679947.829036700
1978-01-01	9277965922.856372800
1979-01-01	-5386663051.226654100
1980-01-01	-15655476542.074900000
1981-01-01	-5304713597.302450200
1982-01-01	5511893342.910110500
1983-01-01	4346783317.350959800
1984-01-01	9212736899.736349100
1985-01-01	17994051589.599701000
1986-01-01	38661456608.193802000
1987-01-01	44216520652.045502000
1988-01-01	53961061179.467903000
1989-01-01	57052694501.388802000
1990-01-01	46455960977.483200000
1991-01-01	-24373157125.678799000
1992-01-01	-22991365269.550098000
1993-01-01	-19284587949.489601000
1994-01-01	-31146422511.999599000
1995-01-01	-29955250274.280998000
1996-01-01	-14401439897.805700000
1997-01-01	-10233944312.768600000
1998-01-01	-15975956712.669300000
1999-01-01	-27748136589.524799000
2000-01-01	-32484371587.759899000
2001-01-01	13259979.804122901
2002-01-01	40816296851.636902000
2003-01-01	46487230816.516899000
2004-01-01	127424320504.401990000
2005-01-01	140216277509.492000000
2006-01-01	182352075939.829010000
2007-01-01	248783095318.129000000
2008-01-01	226272308420.165010000