Year	Percent
1950	12.01753
1955	11.90504
1960	13.01603
1965	12.90811
1970	12.61564
1975	12.15548
1980	10.85961
1985	9.83688
1990	9.60712
1995	9.67577
2000	8.88831
2005	7.9339
2010	7.17584
2015	6.8102
2020	6.32071
2025	6.02055
2030	5.74766
2035	5.4843
2040	5.23699
2045	5.04286
2050	4.91609
2055	4.81908
2060	4.75059
2065	4.68699
2070	4.63143
2075	4.57865
2080	4.55509
2085	4.54353
2090	4.54114
2095	4.53967
2100	4.5232