1973

6.1

2000

8.2

1985

4.8

2016

6.5

2023

5.0

2005

3.8

2023

7.1

2005

6.3

1987

7.1

1997

7.6

2000

5.0

2013

6.0

1992

6.9

1958

8.2

1998

6.8

2002

5.5

2004

5.7

1971

6.8

2006

6.6

1935

7.4