Year	Percent
1950	10.32232
1955	9.96541
1960	9.51395
1965	8.9583
1970	10.44411
1975	10.09708
1980	9.83189
1985	9.85157
1990	9.9777
1995	10.34054
2000	10.51953
2005	10.53847
2010	10.96589
2015	10.89116
2020	10.20538
2025	9.09805
2030	7.6743
2035	7.41311
2040	7.11232
2045	6.63568
2050	6.02945
2055	5.53948
2060	5.25571
2065	5.07344
2070	4.924
2075	4.77647
2080	4.64865
2085	4.56586
2090	4.53173
2095	4.53785
2100	4.5505