Year	Percent
1950	11.47155
1955	11.43394
1960	10.92825
1965	10.41952
1970	10.12641
1975	10.54184
1980	11.49852
1985	10.44188
1990	10.07135
1995	9.68738
2000	9.01813
2005	8.83143
2010	8.50359
2015	8.23731
2020	7.82714
2025	7.43063
2030	7.08445
2035	6.77664
2040	6.50316
2045	6.25471
2050	6.02593
2055	5.80517
2060	5.60791
2065	5.44813
2070	5.31122
2075	5.2013
2080	5.09878
2085	5.00012
2090	4.91567
2095	4.84029
2100	4.77823