Year	Percent
1950	11.24797
1955	10.03587
1960	11.06426
1965	10.21287
1970	10.554
1975	9.99612
1980	10.06387
1985	10.03467
1990	11.68291
1995	11.71132
2000	10.90936
2005	10.51917
2010	10.33176
2015	10.73139
2020	10.82347
2025	10.90157
2030	10.41079
2035	9.71429
2040	9.2871
2045	9.05971
2050	8.88507
2055	8.64488
2060	8.32876
2065	7.96754
2070	7.6528
2075	7.38114
2080	7.15888
2085	6.93183
2090	6.69602
2095	6.45526
2100	6.23125