Year	Percent
1950	14.27417
1955	14.80891
1960	13.60815
1965	14.2064
1970	14.79766
1975	15.09923
1980	15.02412
1985	14.70659
1990	14.42983
1995	14.04178
2000	13.59526
2005	13.22929
2010	12.52666
2015	12.5233
2020	12.56125
2025	11.8778
2030	11.20515
2035	10.68556
2040	10.31274
2045	9.98952
2050	9.68109
2055	9.3157
2060	8.90324
2065	8.52587
2070	8.21265
2075	7.92984
2080	7.64864
2085	7.36052
2090	7.08091
2095	6.80842
2100	6.57392