Year	Percent
1950	9.49414
1955	9.20186
1960	8.97881
1965	8.91559
1970	10.28299
1975	10.02625
1980	9.71831
1985	9.59658
1990	9.99873
1995	10.20687
2000	10.33345
2005	10.54446
2010	10.8805
2015	11.10271
2020	11.2151
2025	11.20659
2030	11.13306
2035	10.99781
2040	10.80983
2045	10.57871
2050	10.29002
2055	9.97696
2060	9.6463
2065	9.31622
2070	9.00037
2075	8.70969
2080	8.43379
2085	8.16513
2090	7.89657
2095	7.64802
2100	7.40347