Year	Percent
1950	10.34447
1955	9.45209
1960	10.80934
1965	12.57113
1970	12.3484
1975	13.88444
1980	12.0954
1985	9.73006
1990	7.62087
1995	7.73934
2000	7.74838
2005	7.17103
2010	6.20313
2015	6.01072
2020	6.02247
2025	4.5112
2030	4.80798
2035	4.56189
2040	4.57363
2045	4.71614
2050	4.77796
2055	4.62958
2060	4.45793
2065	4.44283
2070	4.52476
2075	4.61937
2080	4.65697
2085	4.59581
2090	4.47352
2095	4.38016
2100	4.37457