1999

6.1

2008

6.2

1966

5.7

1997

5.5

2013

6.7

2015

10.0

2016

6.5

1992

6.3

2000

5.8

1963

6.9

2009

5.8

2021

4.1

2017

5.5

1996

6.4

1989

5.8

0.0

1973

6.5

1979

7.7

1932

7.4

1986

5.8