Year	Percent
1950	10.07521
1955	10.72641
1960	10.98984
1965	10.62834
1970	9.06134
1975	9.69289
1980	10.16131
1985	10.5232
1990	10.4776
1995	10.3466
2000	10.12557
2005	10.65777
2010	10.94236
2015	11.05774
2020	10.81921
2025	10.72138
2030	10.56774
2035	10.4499
2040	10.28212
2045	10.02447
2050	9.71955
2055	9.43056
2060	9.19103
2065	8.96348
2070	8.72814
2075	8.47463
2080	8.22454
2085	7.99087
2090	7.77318
2095	7.56228
2100	7.345