Year	%
1975	1.31707638311313
1976	1.35415538203848
1977	1.02510674708524
1978	1.20751542016668
1979	1.2118164143414
1980	0.984288546640953
1981	0.9223077620954679
1982	1.00661458671456
1983	1.59164535379369
1984	2.10092117921482
1985	9.972754967598089
1986	11.8413686170066
1987	10.548255608439
1988	18.5995638283271
1989	34.800592780871696
1990	30.4487424
1991	22.4066305743149
1992	46.800241314672505
1993	50.1544196473177
1994	54.876686396474504
1995	46.6124078962768
1996	47.5652511564565
1997	46.7738626181872
1998	67.89698517772051
1999	57.014739167014405
2000	80.4068176826332
2001	77.5449788890781
2002	42.355628745690396
2003	36.071229625284104
2004	45.054594364699504