1998

6.6

2023

5.3

1986

2.0

1997

6.3

1999

3.0

2006

5.5

1986

6.5

2016

7.0

2013

5.9

2020

6.9

2018

7.0

2020

7.8

2014

5.4

1991

4.7

2015

6.9

2000

5.0

1995

6.1

1995

5.1

1976

8.0

2007

5.8