1993

7.4

2006

7.7

1978

6.3

1955

7.5

1955

6.8

1960

6.7

2014

6.0

2017

6.1

2001

6.2

1990

6.1

2001

6.7

2011

0.8

1961

6.9

1984

4.6

2007

6.0

1995

7.0

2015

4.1

1997

0.0

1962

6.9

2025

5.4