2013

7.0

1995

7.9

1989

6.0

2009

7.4

1985

6.1

1977

6.3

2023

8.2

2007

6.6

2020

6.8

1989

6.1

1965

6.9

2022

7.1

1987

6.8

2022

7.5

2021

6.2

1970

7.6

1950

7.6

1982

6.5

1975

6.4

1989

5.7