2015

7.5

1980

8.5

2005

6.0

1968

7.6

1986

6.0

2010

7.2

1985

6.7

2006

7.3

1989

7.3

2001

7.2

2022

3.9

1976

5.2

1973

7.4

2023

6.5

2020

5.8

2014

6.6

2021

7.6

2002

5.7

2007

4.8

1990

6.9