1987

7.8

2003

7.4

1960

8.1

1989

7.1

1979

6.6

1971

5.8

1969

6.7

2000

6.0

2017

6.0

1971

7.0

2023

8.6

2015

6.9

2018

8.2

1934

6.4

2015

7.5

2025

0.0

2018

5.6

1949

6.5

2004

5.0

2006

2.7