Year	Percent
1950	14.74157
1955	14.91019
1960	13.36475
1965	14.03901
1970	14.40652
1975	14.6062
1980	14.47881
1985	14.49423
1990	15.03058
1995	16.70047
2000	14.7333
2005	13.05152
2010	14.09691
2015	14.78339
2020	13.80087
2025	12.8222
2030	12.04461
2035	11.51398
2040	11.14343
2045	10.71602
2050	10.16034
2055	9.55586
2060	9.02677
2065	8.60904
2070	8.26019
2075	7.9172
2080	7.53389
2085	7.16143
2090	6.83355
2095	6.55261
2100	6.32002