1962

6.9

1964

7.0

1986

7.1

2007

6.8

1984

5.9

2005

7.4

2019

5.8

2007

5.6

2004

7.0

2000

6.0

2023

8.6

1999

7.3

2006

6.6

1991

6.3

1954

7.6

1955

6.0

1990

5.0

1904

7.2

1925

6.7

1960

5.7