1950

4.6

1951

5.3

1952

5.2

1954

4.2

1962

8.0

1981

5.9

1963

5.0

1962

6.9

2016

6.7

1964

6.0

1994

5.9

1997

5.6

1962

6.7

1986

7.4

1994

6.0

1985

6.7

2003

6.5

1996

5.3

1985

5.4

2021

0.0