Year	Percent
1970	59.57773
1971	61.30303
1972	64.4587
1973	65.14809
1977	74.72622
1978	75.02513
1980	90.85964
1981	88.1679
2004	89.22809
2005	89.51743
2014	98.8151
2015	101.02304
2016	101.64812