Year	Percent
1950	10.8353
1955	10.90234
1960	9.99238
1965	8.95194
1970	9.34569
1975	10.42457
1980	10.76599
1985	10.95271
1990	10.86228
1995	10.64604
2000	10.37391
2005	9.6599
2010	9.03382
2015	8.53207
2020	8.43121
2025	8.09354
2030	8.04909
2035	7.53647
2040	7.12879
2045	6.83647
2050	6.64744
2055	6.49143
2060	6.32018
2065	6.13978
2070	5.96473
2075	5.82402
2080	5.71874
2085	5.64424
2090	5.56552
2095	5.49025
2100	5.42058