1999

6.3

2001

5.8

1968

7.7

2006

6.7

2007

6.9

2018

3.8

1995

7.6

1989

7.8

1985

8.3

2001

7.8

1957

7.2

2020

0.0

1989

7.8

1986

7.2

1990

7.5

1996

7.3

0.0

2004

8.0

1979

6.2

1985

6.2