2003

6.1

1990

6.2

1991

6.8

2014

7.6

1999

6.5

2023

6.4

1966

7.3

1981

7.1

2006

6.3

2000

6.3

1998

7.0

1960

7.3

1998

6.5

2001

6.9

2000

6.9

1978

7.5

2004

7.1

1925

7.1

2017

5.7

2021

4.5