Year	Percent
1950	9.03368
1955	8.32505
1960	8.32895
1965	8.70741
1970	8.20414
1975	6.86262
1980	5.63991
1985	5.71219
1990	5.76938
1995	6.05746
2000	5.59951
2005	4.93469
2010	4.90292
2015	5.13561
2020	5.2545
2025	5.09611
2030	4.86894
2035	4.67062
2040	4.59364
2045	4.64211
2050	4.74877
2055	4.81145
2060	4.79654
2065	4.72349
2070	4.65796
2075	4.63656
2080	4.65247
2085	4.67194
2090	4.65504
2095	4.59545
2100	4.51552