Year	Percent
1950	7.68194
1955	9.39527
1960	10.42722
1965	10.32091
1970	8.96047
1975	8.11463
1980	7.83924
1985	8.10804
1990	7.92734
1995	7.10445
2000	5.51881
2005	4.95762
2010	5.92753
2015	6.40702
2020	5.89917
2025	5.3736
2030	5.046
2035	5.02653
2040	5.20388
2045	5.33191
2050	5.2401
2055	5.01158
2060	4.8397
2065	4.8241
2070	4.91469
2075	4.9925
2080	4.96684
2085	4.84119
2090	4.7103
2095	4.64903
2100	4.65786