1992

7.2

2016

7.3

2006

6.5

2002

7.4

1984

7.1

1999

7.6

2007

6.4

1990

6.2

2024

6.6

2016

4.6

2023

5.6

1991

6.7

2017

6.6

2020

7.8

1977

7.0

1969

5.0

2013

5.5

2007

6.0

1986

6.1

1980

5.5