Year	Percent
1950	9.82871
1955	8.607
1960	9.15867
1965	10.26908
1970	11.31952
1975	11.9721
1980	12.89191
1985	11.9372
1990	10.46297
1995	9.21028
2000	8.7022
2005	9.22589
2010	8.43509
2015	7.82498
2020	7.90955
2025	7.27851
2030	6.96678
2035	6.44144
2040	6.19977
2045	6.11163
2050	6.01592
2055	5.8457
2060	5.62779
2065	5.4379
2070	5.29484
2075	5.19965
2080	5.1117
2085	5.01541
2090	4.90976
2095	4.81873
2100	4.76057