Year	Percent
1950	8.7735
1955	8.3553
1960	8.45813
1965	9.37495
1970	10.33153
1975	11.57497
1980	10.68626
1985	9.58045
1990	9.28605
1995	7.29328
2000	7.1075
2005	6.7231
2010	6.55339
2015	6.12963
2020	6.02068
2025	5.83857
2030	5.74633
2035	5.62269
2040	5.53484
2045	5.47638
2050	5.45089
2055	5.45015
2060	5.45321
2065	5.4341
2070	5.40572
2075	5.36596
2080	5.33484
2085	5.30612
2090	5.28425
2095	5.25296
2100	5.21804