1968

7.1

1979

8.0

1984

5.7

2010

5.9

1989

5.4

2015

8.3

1981

5.5

1993

4.0

1968

6.7

1991

7.4

1992

4.0

1981

6.0

1985

4.1

2014

6.7

1998

7.9

2014

6.2

2000

6.5

1982

6.3

2019

7.1

2002

5.4

1979

2.1

2005

6.8

1989

0.0

1996

6.9

1988

7.3

1987

8.0

1998

7.1