Year	Percent
1950	9.88535
1955	9.5038
1960	9.53639
1965	10.41866
1970	11.16246
1975	11.50256
1980	11.94287
1985	11.73184
1990	10.22233
1995	10.2595
2000	10.28464
2005	9.77996
2010	9.27458
2015	8.43846
2020	8.04134
2025	7.44063
2030	6.91157
2035	6.50805
2040	6.12403
2045	5.82908
2050	5.59483
2055	5.41244
2060	5.27452
2065	5.15624
2070	5.06399
2075	4.99273
2080	4.94752
2085	4.92022
2090	4.90793
2095	4.89445
2100	4.88812