Year	Percent
1950	10.5194
1955	10.35846
1960	9.7281
1965	8.91242
1970	9.08934
1975	9.2892
1980	9.30827
1985	9.44939
1990	9.89288
1995	10.51547
2000	10.48504
2005	10.40924
2010	10.70186
2015	11.0115
2020	10.73154
2025	10.48594
2030	10.55056
2035	10.55565
2040	10.41654
2045	10.2088
2050	10.02481
2055	9.84854
2060	9.66825
2065	9.47421
2070	9.26702
2075	9.0831
2080	8.89391
2085	8.70845
2090	8.50992
2095	8.32675
2100	8.13521