1997

7.1

1962

6.7

2006

5.6

2008

5.5

2023

9.0

2015

1.0

2015

7.0

2017

6.1

2001

6.4

2004

7.0

1999

5.4

2014

6.4

1931

8.3

1942

7.8

1940

7.9

2001

6.8

1994

6.7

2001

7.3

2004

6.9

1975

6.8