1986

5.8

2009

6.0

2004

7.9

1989

5.2

2002

5.4

2007

5.1

2021

9.2

1985

6.1

2003

6.2

1972

6.4

2002

5.8

2005

6.3

1989

6.2

1997

6.1

2010

7.5

1971

7.1

2009

4.7

1931

8.3

1970

7.1

1971

6.8