1989

9.3

2009

6.3

1984

7.1

2003

6.2

2004

7.1

1998

6.1

1978

6.0

1999

5.2

2015

8.0

2007

5.7

2008

7.1

1949

6.7

2016

6.2

2021

6.2

2016

5.9

1992

5.2

1948

7.3

1994

6.5

2014

6.2

1978

6.9