Year	Percent
1950	14.42966
1955	12.9442
1960	15.3959
1965	15.56177
1970	15.92339
1975	15.85037
1980	16.26054
1985	16.16609
1990	15.8982
1995	15.18333
2000	14.46415
2005	14.00343
2010	13.81538
2015	14.19628
2020	14.32527
2025	13.03304
2030	11.93496
2035	11.17251
2040	10.66498
2045	10.17304
2050	9.62557
2055	9.04284
2060	8.45991
2065	7.97022
2070	7.55898
2075	7.22121
2080	6.91495
2085	6.61703
2090	6.3601
2095	6.13734
2100	5.96522