Year	Percent
1950	10.82005
1955	10.88756
1960	10.76727
1965	12.02451
1970	11.96366
1975	11.89126
1980	11.85875
1985	12.07968
1990	12.19523
1995	12.03994
2000	11.4749
2005	10.70713
2010	10.12623
2015	9.60206
2020	9.38133
2025	9.38239
2030	8.99371
2035	8.53242
2040	8.09162
2045	7.7455
2050	7.49403
2055	7.26626
2060	7.0175
2065	6.76655
2070	6.53312
2075	6.35356
2080	6.21507
2085	6.09021
2090	5.9787
2095	5.86645
2100	5.76626