1985

2.4

2004

6.8

2005

5.9

1999

7.5

2001

6.2

1990

6.9

1964

5.2

2000

7.3

1999

6.5

1968

5.8

2015

3.1

1940

5.0

2005

5.6

1953

6.9

1985

5.0

2025

0.0

2009

5.1

1987

6.4

2009

5.2

1972

7.0