Year	Measure
1971	80.26251
1972	88.51511
1973	101.40204
1974	123.35541
1975	127.43282
1976	55.56261
1977	53.99098
1978	52.41073
1979	54.62001
1980	56.66357
1981	54.73521
1982	56.35475
1983	59.1045
1984	48.84541
1985	56.93257
1986	55.3061
1987	54.10817
1988	53.06598
1989	51.91407
1990	51.76051
1991	53.13282
1992	52.20404
1993	50.73213
1994	49.41732
1995	48.14635
1996	50.12844
1997	68.32801
1998	72.62493
1999	71.5371
2000	75.05661
2001	82.43409
2002	85.75827
2003	95.4219
2004	87.03619
2005	108.63038
2006	143.91188
2007	132.68128
2008	171.87958
2009	188.96167
2010	206.34058
2011	207.03126
2012	219.35636
2013	280.40252
2014	312.47602