1962

7.9

2015

7.5

1989

6.9

1991

6.3

1993

5.5

1997

6.6

1999

6.3

2002

6.0

2001

5.8

1968

7.6

2018

4.8

1988

5.3

1961

5.0

1985

1.0

1998

3.5

1999

7.4

2014

6.6

1990

5.7

1989

7.8

1986

7.1