Year	Percent
1950	10.01546
1955	9.60409
1960	9.31654
1965	8.9017
1970	11.44605
1975	10.91297
1980	10.52676
1985	11.40363
1990	11.35832
1995	11.46721
2000	12.40598
2005	11.91315
2010	12.48866
2015	12.37977
2020	11.05608
2025	9.71005
2030	9.1138
2035	9.3125
2040	9.50567
2045	9.32918
2050	8.66958
2055	7.80683
2060	7.21641
2065	7.04609
2070	7.09441
2075	7.04443
2080	6.74773
2085	6.29751
2090	5.93255
2095	5.78804
2100	5.81836