1951

5.0

2002

7.4

2007

6.2

2021

5.4

1986

8.0

2011

7.2

1995

6.9

1969

6.7

1975

8.4

2001

8.5

2002

6.4

2003

6.0

1987

6.5

1994

7.1

1989

7.8

2000

6.5

1985

8.1

2003

7.0

1988

5.2

2009

6.5