Year	Percent
1950	11.03696
1955	10.88472
1960	10.78432
1965	10.42383
1970	9.8388
1975	9.36745
1980	7.93969
1985	7.80907
1990	7.6122
1995	7.436
2000	6.97329
2005	6.46133
2010	6.76556
2015	6.68672
2020	6.72838
2025	6.39091
2030	6.07545
2035	5.86515
2040	5.83371
2045	5.88229
2050	5.89806
2055	5.81755
2060	5.68672
2065	5.56361
2070	5.48453
2075	5.45382
2080	5.42745
2085	5.37864
2090	5.29593
2095	5.20104
2100	5.12036