Year	Percent
1950	12.9134
1955	12.93844
1960	13.51452
1965	13.87534
1970	14.30443
1975	14.54643
1980	14.89344
1985	15.00787
1990	14.55515
1995	13.93811
2000	13.49171
2005	13.66825
2010	13.71373
2015	14.3591
2020	14.19456
2025	13.24073
2030	12.73535
2035	12.52304
2040	12.34029
2045	11.97375
2050	11.45824
2055	10.96891
2060	10.57044
2065	10.22039
2070	9.88685
2075	9.50862
2080	9.11646
2085	8.75577
2090	8.42395
2095	8.13647
2100	7.83897