Year	Percent
1950	13.06242
1955	13.88413
1960	13.87873
1965	14.21242
1970	14.39175
1975	14.51963
1980	14.5825
1985	14.88046
1990	14.96841
1995	14.10627
2000	13.73089
2005	13.44459
2010	12.16118
2015	11.53209
2020	11.86547
2025	11.59435
2030	10.95666
2035	10.2482
2040	9.72343
2045	9.29016
2050	8.86595
2055	8.40228
2060	7.96327
2065	7.56343
2070	7.19759
2075	6.90359
2080	6.64676
2085	6.40981
2090	6.20039
2095	6.01147
2100	5.85405