Year	Percent
1950	11.51369
1955	11.74182
1960	12.42904
1965	11.78327
1970	11.82913
1975	12.24195
1980	12.99622
1985	12.64692
1990	8.99282
1995	11.19437
2000	12.54694
2005	14.23685
2010	14.30374
2015	12.80394
2020	13.10888
2025	12.95871
2030	12.36109
2035	12.11893
2040	11.8219
2045	11.35321
2050	10.79368
2055	10.22779
2060	9.6881
2065	9.22971
2070	8.79623
2075	8.38495
2080	7.95543
2085	7.53748
2090	7.17511
2095	6.84288
2100	6.56896