Year	Percent
1950	14.96388
1955	15.04335
1960	14.61204
1965	14.93206
1970	14.71148
1975	14.59782
1980	14.72356
1985	15.02231
1990	15.11225
1995	14.33074
2000	13.95513
2005	13.53171
2010	12.43894
2015	12.99932
2020	11.95032
2025	11.40037
2030	10.81698
2035	10.31292
2040	9.88936
2045	9.49883
2050	9.12008
2055	8.74383
2060	8.35461
2065	7.99984
2070	7.66436
2075	7.36096
2080	7.05849
2085	6.77356
2090	6.5101
2095	6.28062
2100	6.071