Year	Percent
1950	14.08722
1955	14.23052
1960	13.06229
1965	13.7419
1970	14.09489
1975	14.33011
1980	14.28573
1985	14.3019
1990	14.82461
1995	16.47303
2000	14.54826
2005	12.67681
2010	13.61652
2015	14.24441
2020	13.33647
2025	12.41006
2030	11.61219
2035	11.07368
2040	10.70829
2045	10.28755
2050	9.74305
2055	9.15016
2060	8.63092
2065	8.22138
2070	7.88254
2075	7.55324
2080	7.18857
2085	6.83565
2090	6.52766
2095	6.2668
2100	6.05455