Year	Percent
1950	8.69368
1955	10.32279
1960	10.14178
1965	10.15908
1970	9.98294
1975	9.22111
1980	9.05923
1985	7.69057
1990	7.62197
1995	7.38988
2000	7.42583
2005	6.80434
2010	6.28006
2015	6.58985
2020	6.59025
2025	6.63385
2030	6.33932
2035	6.05972
2040	5.86816
2045	5.83951
2050	5.8867
2055	5.90082
2060	5.82308
2065	5.69705
2070	5.57653
2075	5.49833
2080	5.46767
2085	5.43945
2090	5.38776
2095	5.30437
2100	5.21056