Year	Percent
1950	11.15513
1955	10.01092
1960	10.96672
1965	12.56964
1970	11.13
1975	10.0929
1980	10.21735
1985	9.02811
1990	8.55018
1995	8.68049
2000	8.22648
2005	7.62661
2010	6.50512
2015	5.85185
2020	5.37721
2025	5.53067
2030	5.54415
2035	5.40847
2040	5.14972
2045	4.89125
2050	4.77333
2055	4.81492
2060	4.92415
2065	4.9821
2070	4.9379
2075	4.85174
2080	4.80258
2085	4.82876
2090	4.89763
2095	4.93504
2100	4.92189