Year	Percent
1950	10.10161
1955	10.6179
1960	10.51939
1965	11.55336
1970	11.55117
1975	11.47776
1980	11.18442
1985	9.98934
1990	9.03035
1995	8.90158
2000	9.06814
2005	8.4113
2010	7.5597
2015	6.89542
2020	6.58086
2025	6.14281
2030	5.88502
2035	5.65092
2040	5.42302
2045	5.20589
2050	5.03773
2055	4.93203
2060	4.85202
2065	4.79679
2070	4.74394
2075	4.6966
2080	4.6517
2085	4.63541
2090	4.62778
2095	4.62487
2100	4.62041