1999

6.8

2011

7.1

2006

8.3

5.7

1977

5.8

1947

6.9

1937

7.0

2023

7.4

2006

6.7

1969

5.1

1971

6.8

2011

9.5

1952

7.0

2012

5.9

1997

7.1

2019

6.9

2011

5.7

2023

5.8

1991

6.4

2020

7.0