1992

5.2

1963

5.6

2001

5.8

2008

6.6

1986

6.9

2018

7.1

2000

6.8

1971

6.0

2013

4.3

1960

7.8

2006

6.5

2019

10.0

1999

5.7

1979

6.0

2006

5.6

2001

6.7

2003

8.1

1999

7.2

2006

6.6

1991

6.0