1966

7.8

1989

7.0

1974

6.5

2003

7.3

1972

8.7

2005

6.6

2004

6.7

2018

8.2

2019

8.1

1975

7.9

1976

7.7

1973

6.8

1987

7.3

2004

5.9

2019

8.0

1975

8.0

2001

7.5

2000

7.3

2016

8.5

1990

6.1