1982

7.5

1996

6.9

1997

7.2

2002

6.4

1982

8.1

2001

7.0

1986

8.0

2005

6.5

1996

6.4

1987

7.5

1955

6.0

1977

7.3

1985

2.8

2019

6.1

2019

6.1

2021

7.5

2007

5.2

2001

7.2

1990

6.3

1998

6.4