Year	Percent
1950	9.18376
1955	9.37058
1960	8.46172
1965	12.58445
1970	13.15764
1975	13.3613
1980	12.55016
1985	11.48978
1990	11.93362
1995	10.39073
2000	9.91608
2005	8.2845
2010	7.3508
2015	6.20426
2020	7.02098
2025	7.90646
2030	7.28293
2035	6.40669
2040	5.97953
2045	5.96801
2050	6.13185
2055	6.19784
2060	6.02948
2065	5.73006
2070	5.50261
2075	5.43472
2080	5.46372
2085	5.45669
2090	5.34552
2095	5.18273
2100	5.048