Year	Percent
1950	14.38905
1955	14.78963
1960	14.83027
1965	15.31327
1970	15.5678
1975	15.57809
1980	12.93466
1985	11.46376
1990	10.8112
1995	10.76092
2000	10.05796
2005	8.80596
2010	7.80164
2015	7.7902
2020	7.41849
2025	7.04739
2030	6.71363
2035	6.39347
2040	6.10006
2045	5.882
2050	5.74007
2055	5.62738
2060	5.51401
2065	5.38541
2070	5.26179
2075	5.15846
2080	5.07883
2085	5.01689
2090	4.95994
2095	4.90382
2100	4.84677