1989

6.0

2014

5.7

1995

6.2

2002

6.2

1985

6.1

1986

5.8

6.2

1987

6.8

2003

6.3

2005

6.7

2000

6.6

1936

6.8

1989

5.1

2010

6.5

1932

6.4

1969

6.6

1989

6.2

1994

7.2

1940

6.2

1958

7.0