1998

3.8

1961

7.7

2007

7.1

1994

6.5

1984

7.3

2013

6.1

2020

5.2

2010

5.8

2014

6.5

1988

7.5

2009

6.7

2000

4.9

2014

6.2

1991

6.8

2002

7.1

2001

7.4

1993

5.8

2002

5.2

2023

6.3

1990

6.1