Year	Percent
1950	5.5909
1955	5.60865
1960	5.5526
1965	9.24468
1970	12.65819
1975	12.68007
1980	12.9696
1985	12.90669
1990	15.43195
1995	13.267
2000	14.12544
2005	12.5446
2010	12.62016
2015	13.21885
2020	13.03987
2025	12.51046
2030	11.78921
2035	11.34034
2040	11.04718
2045	10.73256
2050	10.37214
2055	10.01689
2060	9.6613
2065	9.32991
2070	9.01233
2075	8.73885
2080	8.4931
2085	8.25372
2090	8.00614
2095	7.77856
2100	7.54407