1958

7.5

2015

5.7

1995

6.5

1999

5.6

2000

6.2

2005

4.6

2007

5.5

1989

5.9

1976

7.3

2003

6.1

2007

1.8

1987

7.1

1990

6.7

2006

5.3

2023

2.2

2021

0.0

1969

6.4

1939

6.7

1957

6.8

1967

6.5