Year	Percent
1950	11.93464
1955	12.02674
1960	12.05101
1965	12.28547
1970	12.58485
1975	12.68653
1980	12.47343
1985	12.14753
1990	11.35403
1995	10.55301
2000	10.03252
2005	9.49468
2010	9.25058
2015	8.73616
2020	8.42926
2025	8.21976
2030	7.74399
2035	7.36027
2040	7.04029
2045	6.74027
2050	6.45796
2055	6.20999
2060	5.97661
2065	5.76326
2070	5.58036
2075	5.43
2080	5.29021
2085	5.16915
2090	5.06246
2095	4.9675
2100	4.88677