Year	Percent
1950	8.56997
1955	9.1488
1960	9.90299
1965	9.19177
1970	9.90449
1975	10.04293
1980	10.29699
1985	10.48159
1990	10.50496
1995	10.60368
2000	10.7084
2005	10.80907
2010	10.90589
2015	10.88901
2020	10.79967
2025	10.80376
2030	10.70643
2035	10.48393
2040	10.29176
2045	10.09953
2050	9.89676
2055	9.68912
2060	9.46007
2065	9.2273
2070	9.0192
2075	8.81632
2080	8.63901
2085	8.443
2090	8.25996
2095	8.07815
2100	7.91311