Year	Percent
1950	12.40878
1955	11.56584
1960	12.93693
1965	14.33814
1970	14.53858
1975	14.40575
1980	13.88456
1985	13.23334
1990	12.56691
1995	11.35131
2000	10.41013
2005	10.1955
2010	10.00869
2015	9.28018
2020	9.12023
2025	8.4645
2030	7.94465
2035	7.56515
2040	7.30593
2045	7.08816
2050	6.85714
2055	6.62727
2060	6.41309
2065	6.24157
2070	6.11015
2075	6.01239
2080	5.91107
2085	5.81286
2090	5.71852
2095	5.63384
2100	5.56659