1976

7.0

1990

5.7

1986

6.7

1976

8.0

1998

7.4

1969

7.2

1964

5.0

1970

3.0

2004

7.9

2017

6.7

2018

6.8

2010

8.1

1995

6.5

2002

6.9

1982

7.6

1972

7.3

1991

6.6

2022

6.9

2021

8.1

2020

0.0