1961

8.4

1986

5.9

1970

7.4

1956

6.3

1990

6.5

2001

7.2

2002

6.2

2007

7.1

2007

6.2

1955

7.2

1971

6.4

2021

7.8

2009

5.0

2003

7.2

2019

7.0

2024

6.8

1993

5.8

1972

6.2

2007

4.6

2015

5.8