Year	Percent
1950	8.16558
1955	9.04613
1960	10.40838
1965	10.73802
1970	11.21668
1975	10.59319
1980	9.31142
1985	8.9277
1990	8.33847
1995	8.09897
2000	7.61584
2005	8.08284
2010	6.84463
2015	6.51538
2020	6.94804
2025	6.44094
2030	6.19636
2035	5.97029
2040	5.71496
2045	5.51211
2050	5.41319
2055	5.36185
2060	5.28388
2065	5.17009
2070	5.06304
2075	4.97703
2080	4.92559
2085	4.9047
2090	4.88207
2095	4.84444
2100	4.79319