Year	Percent
1950	8.24376
1955	9.19791
1960	8.56568
1965	7.83587
1970	7.26449
1975	7.08739
1980	7.21849
1985	7.26922
1990	6.36974
1995	5.96386
2000	4.89669
2005	3.82291
2010	4.05388
2015	4.67348
2020	4.55525
2025	4.5335
2030	4.43356
2035	4.25751
2040	4.19553
2045	4.38967
2050	4.62459
2055	4.71533
2060	4.6991
2065	4.65315
2070	4.65257
2075	4.74517
2080	4.88442
2085	4.96978
2090	4.94975
2095	4.86965
2100	4.80241