Year	Percent
1950	7.57192
1955	8.14711
1960	8.51942
1965	8.06842
1970	8.124
1975	7.26931
1980	6.90212
1985	6.42598
1990	6.68793
1995	6.30189
2000	6.06094
2005	6.17471
2010	6.2963
2015	6.97957
2020	8.48534
2025	10.76752
2030	12.89219
2035	15.07966
2040	17.09271
2045	19.0458
2050	21.62483
2055	22.84013
2060	22.90099
2065	22.59729
2070	23.37634
2075	25.62051
2080	27.32171
2085	28.443
2090	29.17558
2095	29.78116
2100	30.44888