1985

6.9

6.6

1999

6.8

2015

6.7

2024

6.6

2011

6.6

2015

6.4

7.1

2023

6.6

1985

6.1

2015

6.6

1993

6.5

2024

6.0

2020

6.5

1972

6.3

1993

6.5

2023

6.9

1975

7.1

1999

7.2

1991

5.1