1999

6.8

1978

7.2

1998

8.1

2002

5.3

2018

8.0

2001

5.9

2020

6.3

1999

6.2

1968

4.9

1965

6.8

1967

6.7

2003

6.3

1972

6.3

1995

5.4

2019

3.3

1997

5.8

2000

6.3

1951

5.7

1982

0.0

1976

6.8