1981

7.4

2007

5.8

2023

8.0

2009

5.8

2006

5.5

2022

8.0

1994

6.8

1993

5.9

2020

0.0

1971

6.4

2018

5.0

1942

7.0

1997

6.6

1999

6.5

1998

6.1

1998

6.0

2015

5.6

1999

7.0

2002

6.2

1986

6.9