1986

6.2

1999

7.4

2015

5.9

1979

7.3

2023

7.1

1995

6.9

2012

6.3

2009

7.0

1987

4.1

2011

9.5

2009

4.6

1978

6.0

2022

7.4

2020

6.9

2009

6.0

1974

8.6

2013

7.6

2002

9.1

2013

6.8

1999

6.7