Year	% gross
1971	74.0966262817383
1972	85.0136184692383
1973	94.3660507202148
1974	99.1217727661133
1975	103.423942565918
1976	108.190841674805
1977	111.121627807617
1978	111.250778198242
1979	120.826881408691
1980	121.298309326172
1981	121.910758972168
1983	123.245452880859
1986	114.900123596191
1999	114.178146362305
2001	109.891212463379
2002	107.002082824707
2003	103.780128479004
2004	104.572471618652
2005	100.468826293945
2006	103.586532592773