Year	Percent
1991	195.00398
1992	199.8589
1993	227.30874
1994	139.02307
1995	43.58256
1996	44.14059
1997	135.43356
1998	48.12563
1999	49.50672
2000	43.0697
2001	37.878
2002	22.63229
2003	23.4068
2004	15.49526
2005	12.10367
2006	10.5499
2007	15.68332
2008	15.85611
2009	3.96962
2010	3.53378
2011	4.01365
2012	4.62997
2013	3.41709
2014	1.6859
2015	2.58591
2016	2.05185
2017	5.27786