Year	Percent
1950	10.85879
1955	11.3851
1960	11.94715
1965	11.55253
1970	11.73125
1975	11.77506
1980	11.85838
1985	12.29213
1990	12.56336
1995	12.57353
2000	12.35484
2005	12.27792
2010	12.01881
2015	10.85766
2020	10.37802
2025	10.7946
2030	10.63675
2035	10.10734
2040	9.48852
2045	9.03092
2050	8.66073
2055	8.29954
2060	7.90419
2065	7.52451
2070	7.17324
2075	6.84854
2080	6.58865
2085	6.36238
2090	6.15513
2095	5.97174
2100	5.80673