1988

5.5

1989

5.8

1989

6.1

2015

6.4

1990

4.4

1988

5.9

1993

7.0

1985

6.1

1985

6.8

2013

6.6

2008

6.7

2010

6.1

2018

6.5

1992

6.0

2009

6.3

1999

7.4

1975

6.9

2022

10.0

1999

7.2

2012

8.2