2016

6.7

1982

6.8

1997

6.1

2004

6.5

1985

6.4

2008

5.7

2001

6.4

2003

4.8

2015

7.0

1964

7.0

1969

6.7

1988

6.4

1990

7.5

2025

7.8

1979

6.7

2025

7.0

1980

6.7

1969

6.6

1998

6.9