Year	Percent
1961-01-01	3559810291.5814700
1962-01-01	3972552464.1374598
1963-01-01	4234790817.5393105
1964-01-01	4646909355.4855500
1965-01-01	5102162620.6064810
1966-01-01	5437989857.9593900
1967-01-01	5544943193.5323200
1968-01-01	5906963084.4949200
1969-01-01	6308687712.2785800
1970-01-01	6045409967.8604700
1971-01-01	6431751608.6035000
1972-01-01	6967141921.0779200
1973-01-01	7678709010.8080410
1974-01-01	7867982114.8685890
1975-01-01	7295381604.0121400
1976-01-01	7890744778.1246400
1977-01-01	8151008288.5956000
1978-01-01	8603455197.9726410
1979-01-01	8950092101.8946190
1980-01-01	8540156285.0825400
1981-01-01	8745020254.3869500
1982-01-01	7788400590.3558100
1983-01-01	8201324012.2509310
1984-01-01	9301995249.2785300
1985-01-01	9768766303.0375610
1986-01-01	9873531083.3986100
1987-01-01	10323268702.5884000
1988-01-01	10996913566.5185010
1989-01-01	11176588827.9419000
1990-01-01	10766504311.8083000
1991-01-01	10007692275.0322990
1992-01-01	10158337435.6039000
1993-01-01	10714946120.0747000
1994-01-01	11521470089.1654990
1995-01-01	12111548400.0905000
1996-01-01	12244355768.1166000
1997-01-01	13043186042.2449020
1998-01-01	13694788382.3781000
1999-01-01	14807330729.3535000
2000-01-01	16460860176.9032000
2001-01-01	15653826586.8045000
2002-01-01	15779380496.4989000
2003-01-01	15648213791.6669000
2004-01-01	15955276861.0432000
2005-01-01	16237643631.8139000
2006-01-01	16005360263.8099000
2007-01-01	15649250000.0000000
2008-01-01	14780916666.6667000
2009-01-01	12713666666.6667000
2010-01-01	13299666666.6667000
2011-01-01	13762833333.3333000
2012-01-01	13982750000.0000000
2013-01-01	13888500000.0000000
2014-01-01	14353083333.3333000
2015-01-01	14409666666.6667000
2016-01-01	14513250000.0000000
2017-01-01	14977000000.0000000