Year	% gross
1981	77.8179321289062
1986	80.9728088378906
1989	88.7439575195312
1990	89.1176071166992
1991	91.5305023193359
1992	90.3784027099609
1993	92.234001159668
1994	92.3486022949219
1995	94.8741073608398
1996	96.6685409545898
1997	99.3870391845703
1998	100.246696472168
1999	102.04972076416
2000	103.144233703613
2001	103.148803710938
2002	103.104148864746
2003	102.963088989258
2004	103.970291137695
2005	102.84455871582
2006	102.028747558594
2007	101.104446411133
2008	99.499267578125
2009	99.9498291015625
2010	100.421501159668
2011	101.251838684082
2012	101.85440826416
2013	101.754577636719
2014	101.575569152832
2015	102.089256286621
2016	102.891799926758
2017	103.87474822998
2018	104.265342712402
2019	102.992378234863
2020	102.764572143555
2021	101.434379577637