1994

6.1

1978

5.9

2005

5.1

2003

5.7

1999

8.0

2003

6.8

2002

5.2

1976

6.2

1975

6.3

2017

6.6

1953

7.3

1998

6.1

2022

6.7

1998

5.1

2002

6.5

2008

4.6

1989

5.5

2003

6.2

2015

6.5

2019

6.7