1993

6.6

2019

7.1

2019

7.0

1997

8.0

1992

6.5

2015

5.0

2003

7.0

2008

7.7

2023

6.9

2023

7.6

1996

6.2

1996

6.5

1992

6.0

2008

6.9

1991

6.4

1977

6.8

1999

7.9

1986

7.9

1990

7.4

1998

7.8