1971

6.8

1965

6.8

1964

7.1

1997

6.1

1962

6.9

1985

6.8

2015

6.0

2012

6.1

2022

7.4

1999

5.6

1967

6.5

2015

5.3

1974

7.0

2014

5.8

2000

7.2

2003

5.7

2015

6.0

2010

6.6

2015

5.7

1995

6.5