Year	Percent
1950	13.99098
1955	14.03314
1960	12.3977
1965	13.30246
1970	13.91501
1975	14.33618
1980	14.32861
1985	14.29472
1990	14.03395
1995	14.55974
2000	14.70014
2005	14.71544
2010	14.22718
2015	13.93207
2020	13.5337
2025	13.18726
2030	12.76711
2035	12.25004
2040	11.69471
2045	11.17207
2050	10.71011
2055	10.27589
2060	9.84663
2065	9.416
2070	9.00398
2075	8.62481
2080	8.27702
2085	7.94883
2090	7.62861
2095	7.33309
2100	7.0517