Year	Percent
1950	10.63829
1955	9.01994
1960	8.67884
1965	9.16292
1970	11.20599
1975	11.02445
1980	10.88403
1985	10.87601
1990	11.43677
1995	11.98261
2000	11.98524
2005	11.62678
2010	10.52793
2015	11.52433
2020	12.32881
2025	10.75321
2030	9.61969
2035	8.58894
2040	8.08933
2045	7.76553
2050	7.54846
2055	7.2807
2060	6.83348
2065	6.3717
2070	6.01594
2075	5.79604
2080	5.65538
2085	5.52689
2090	5.38121
2095	5.23178
2100	5.10407