1987

7.7

1999

8.5

1964

7.2

2003

7.4

2000

8.2

2005

8.8

2009

7.2

2019

8.0

2002

7.6

1986

6.1

2021

8.4

2002

8.4

2011

8.7

2010

7.4

2023

8.5

1969

5.4

2020

7.8

1994

8.3

1985

6.0

2004

4.2