1967

7.7

1968

6.9

1955

7.2

7.8

1972

6.3

1989

6.2

1986

7.4

2006

6.8

2021

6.0

2015

6.4

2023

6.2

2023

6.5

1965

6.8

1989

5.5

1969

6.6

2003

6.1

1987

7.0

2014

5.7

1952

7.7

2011

7.5