1985

6.1

2011

9.1

2016

6.9

1997

6.1

2023

6.4

1991

5.9

2010

6.8

1953

7.2

1991

5.7

2010

5.2

2014

8.4

2022

6.4

2023

6.9

1984

9.2

2007

6.5

2007

6.5

1992

6.3

1976

6.2

2023

6.7

1958

5.8