Year	Percent
1950	9.97721
1955	8.04471
1960	9.34327
1965	10.49868
1970	11.49969
1975	12.13188
1980	13.18149
1985	12.09635
1990	10.67666
1995	9.47883
2000	9.00382
2005	9.56507
2010	8.90006
2015	8.31585
2020	8.3298
2025	7.65215
2030	7.33178
2035	6.77442
2040	6.52444
2045	6.4357
2050	6.3362
2055	6.15399
2060	5.91692
2065	5.70449
2070	5.53806
2075	5.42273
2080	5.31853
2085	5.21222
2090	5.10285
2095	5.01157
2100	4.95409