1965

7.5

1994

4.3

1993

4.0

1989

6.0

1956

6.6

1966

7.0

1968

6.9

1951

4.7

1967

4.4

1964

6.1

1958

6.1

1970

7.9

1970

5.0

1960

1.0

1970

6.4