Year	Percent
1950	11.32712
1955	10.67703
1960	9.4642
1965	9.83453
1970	11.00321
1975	11.72175
1980	11.85287
1985	11.50908
1990	11.04471
1995	10.57079
2000	10.4626
2005	10.10662
2010	9.77392
2015	9.13031
2020	8.9386
2025	8.62657
2030	8.26162
2035	7.80676
2040	7.38672
2045	7.0084
2050	6.66535
2055	6.34806
2060	6.05882
2065	5.79953
2070	5.57442
2075	5.38871
2080	5.2391
2085	5.12041
2090	5.01564
2095	4.93217
2100	4.8628