Year	% gross
1970	90.8022003173828
1971	89.7631378173828
1972	89.6398010253906
1973	91.3931427001953
1974	91.3224182128906
1975	93.2952423095703
1976	94.8346710205078
1977	95.3998184204102
1978	94.3859024047852
1979	94.9219436645508
1980	95.8893127441406
1981	96.8663711547852
1982	97.8052291870117
1983	98.7516479492188
1984	99.6304397583008
1985	100.284317016602
1986	100.796661376953
1987	100.252830505371
1988	100.068382263184
1989	99.4859771728516
1990	98.2402572631836
1991	97.4876022338867
1992	96.9253387451172
1993	97.0418395996094
1994	97.2532806396484
1995	97.2410888671875
1996	96.8903884887695
1997	97.2663192749023
1998	97.4733123779297
1999	98.0039672851562
2000	98.7724227905273
2001	99.151611328125
2002	99.5438003540039
2003	101.092292785645
2004	101.901756286621
2005	102.250457763672
2006	102.250381469727
2007	103.092086791992
2008	103.294219970703
2009	103.119682312012
2010	102.384063720703
2011	102.184020996094
2012	102.78825378418
2013	103.114097595215
2014	101.696823120117
2015	101.299346923828
2016	102.326797485352
2017	101.955528259277
2018	99.3946304321289
2019	99.4949417114258
2020	100.003646850586
2021	99.9827575683594
2022	101.428039550781