Year	Percent
1950	12.68285
1955	12.3202
1960	11.08149
1965	13.73517
1970	14.21211
1975	13.14485
1980	12.89102
1985	13.34828
1990	13.6992
1995	13.974
2000	13.45858
2005	12.48251
2010	11.41768
2015	10.38883
2020	9.82757
2025	9.06399
2030	8.36575
2035	7.65621
2040	7.07051
2045	6.58075
2050	6.19451
2055	5.8657
2060	5.57649
2065	5.33321
2070	5.12409
2075	4.97477
2080	4.8655
2085	4.78554
2090	4.73437
2095	4.69097
2100	4.65846