Year	Percent
1950	13.91881
1955	8.0465
1960	9.10457
1965	11.81327
1970	13.6751
1975	14.99089
1980	12.85861
1985	10.74273
1990	9.82265
1995	10.56908
2000	11.93696
2005	10.81908
2010	8.49091
2015	7.14861
2020	7.42845
2025	8.84106
2030	7.88722
2035	6.7804
2040	6.13998
2045	6.08831
2050	6.1718
2055	6.09385
2060	5.86816
2065	5.63979
2070	5.49392
2075	5.47645
2080	5.50697
2085	5.49887
2090	5.43425
2095	5.34328
2100	5.27107