Year	Percent
1950	8.49332
1955	10.08702
1960	9.90992
1965	9.81008
1970	9.59505
1975	8.82212
1980	8.64565
1985	7.28728
1990	7.19681
1995	6.96253
2000	6.83479
2005	6.33495
2010	5.96703
2015	6.1941
2020	6.21229
2025	6.23988
2030	5.9545
2035	5.68244
2040	5.49641
2045	5.46777
2050	5.51349
2055	5.52964
2060	5.46126
2065	5.34642
2070	5.23617
2075	5.16493
2080	5.13851
2085	5.11583
2090	5.0719
2095	4.99666
2100	4.9108