1941

6.9

1987

6.7

1978

6.3

1983

6.5

1998

7.5

1997

7.0

1991

6.9

2023

7.6

2016

5.2

2002

6.5

1990

7.1

2003

4.1

2009

7.1

1992

5.4

2003

6.8

1989

6.3

2008

5.6

1999

6.8

1997

6.9

1992

7.5