Year	Percent
1950	10.42779
1955	11.63682
1960	11.38684
1965	10.92326
1970	9.973
1975	8.88602
1980	7.73684
1985	7.74581
1990	8.45051
1995	7.95631
2000	7.56268
2005	6.64491
2010	5.55048
2015	5.46371
2020	5.43401
2025	5.13918
2030	4.69983
2035	4.48804
2040	4.41743
2045	4.41293
2050	4.38357
2055	4.30897
2060	4.2358
2065	4.20192
2070	4.23444
2075	4.29479
2080	4.34277
2085	4.36462
2090	4.36678
2095	4.36373
2100	4.38188