Year	Percent
1950	13.89408
1955	14.00446
1960	12.22757
1965	13.22436
1970	13.90887
1975	14.38731
1980	14.41724
1985	14.41043
1990	14.16412
1995	14.71054
2000	14.87221
2005	14.88717
2010	14.38903
2015	14.0852
2020	13.67719
2025	13.30095
2030	12.86971
2035	12.34918
2040	11.79233
2045	11.27103
2050	10.81921
2055	10.39324
2060	9.97345
2065	9.55026
2070	9.14788
2075	8.77722
2080	8.43648
2085	8.11618
2090	7.80408
2095	7.51583
2100	7.24034