Year	Percent
1950	9.05134
1955	8.4962
1960	8.99745
1965	8.55624
1970	8.77155
1975	8.75051
1980	8.26338
1985	8.10397
1990	7.59273
1995	6.39133
2000	5.3569
2005	4.87356
2010	4.98083
2015	4.73066
2020	4.48004
2025	4.06886
2030	3.6472
2035	3.47846
2040	3.57207
2045	3.71859
2050	3.81446
2055	3.81921
2060	3.76764
2065	3.74034
2070	3.82313
2075	3.98326
2080	4.14097
2085	4.22025
2090	4.22668
2095	4.20355
2100	4.2087