1988

7.3

1985

6.6

2002

4.0

1973

6.9

1959

7.0

1965

7.1

1983

6.2

1994

6.4

2005

6.2

1975

6.2

1929

0.0

2023

0.0

2002

5.8

1977

7.0

2003

7.8

2004

4.9

2020

7.0

2018

6.5

2003

7.5

1997

5.9