1990

7.7

1971

7.5

2005

7.1

1991

6.8

1971

6.7

1972

6.8

1973

6.8

1977

6.9

2004

6.5

1984

4.3

1967

6.6

1968

6.2

1981

4.5

2016

6.3

2009

6.8

2022

8.2

2014

5.3

2017

5.8

1984

5.9

2017

7.1