Year	Percent
1950	10.88684
1955	10.81937
1960	12.80032
1965	12.61494
1970	12.40969
1975	13.40701
1980	11.67742
1985	12.65786
1990	14.89872
1995	13.65019
2000	12.5856
2005	12.23429
2010	11.68547
2015	11.3673
2020	11.13071
2025	10.92918
2030	10.71214
2035	10.42511
2040	9.99741
2045	9.56059
2050	9.20825
2055	8.844
2060	8.49139
2065	8.15285
2070	7.82054
2075	7.52215
2080	7.23396
2085	6.98057
2090	6.73625
2095	6.50813
2100	6.29494