Year	Percent
1950	9.40074
1955	8.79018
1960	9.79156
1965	9.67667
1970	8.37927
1975	8.29727
1980	7.95207
1985	7.8127
1990	8.04286
1995	7.42376
2000	6.49805
2005	5.3112
2010	4.70803
2015	4.56773
2020	5.21419
2025	5.41677
2030	5.1991
2035	4.84821
2040	4.54847
2045	4.50949
2050	4.7566
2055	5.06811
2060	5.2003
2065	5.12276
2070	4.97882
2075	4.92625
2080	5.01114
2085	5.14978
2090	5.22716
2095	5.17706
2100	5.05358