Year	Percent
1980	14.57154
1981	13.66239
1982	11.79489
1983	15.58761
1984	12.7009
1985	5.68878
1986	12.24338
1987	1.02366
1988	-0.34899
1989	-0.1849
1990	19.78569
1991	7.17309
1992	5.73194
1993	11.70653
1994	8.76327
1995	11.68725
1996	15.05365
1997	13.56669
1998	15.07623
1999	11.8226
2000	4.02282
2001	5.02161
2002	2.74927
2003	5.01275
2004	2.15757