Year	Percent
1950	10.07049
1955	11.49891
1960	11.23019
1965	10.38593
1970	9.82965
1975	11.01539
1980	10.89466
1985	9.81662
1990	9.46343
1995	10.42273
2000	10.7862
2005	10.25459
2010	10.14561
2015	9.02799
2020	8.44494
2025	8.01843
2030	8.24321
2035	7.77927
2040	7.39972
2045	6.99801
2050	6.64976
2055	6.39438
2060	6.23875
2065	6.10581
2070	5.96866
2075	5.81055
2080	5.67511
2085	5.57121
2090	5.49545
2095	5.44346
2100	5.39117