1987

6.8

2018

6.8

2023

6.5

2006

6.2

2016

4.5

1992

6.7

2008

7.1

1994

6.8

2003

6.9

1996

7.3

1986

6.1

2002

6.4

2001

5.6

2007

6.7

2000

5.2

2017

3.9

1998

6.7

1998

6.3

1989

6.3

2001

6.8