2015

6.1

1968

6.9

1980

7.1

2010

6.6

2007

5.7

2023

6.4

1967

6.8

1990

5.1

1956

6.4

2004

4.5

1986

5.8

1964

6.6

1969

6.6

1976

5.7

2017

5.9

1999

7.4

1973

7.8

2006

5.9

2005

5.7

1976

7.3