1

2

3

4

5

6

7

8

9

10

11

12

1950

-1.0

-0.9

-0.9

-0.9

-0.9

-0.9

-0.9

-0.9

-0.9

-0.9

-0.9

-0.9

1951

-0.9

-0.9

-0.9

-0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1952

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1953

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1954

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.4

0.4

0.4

0.4

1955

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.1

0.1

-0.1

-0.1

1956

-0.1

-0.1

0

0

0

0

0

0

0

0.7

0.7

1.3

1957

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1958

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1.3

1959

1.3

1.3

1.0

1.0

1.0

1.0

0.9

0.9

0.9

0.9

0.9

0.9

1960

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

1961

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

1962

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

1.0

1963

1.2

1.2

2.2

2.2

2.2

2.2

2.2

2.2

2.2

2.2

2.2

2.2

1964

2.2

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

1

2

3

4

5

6

7

8

9

10

11

12

1965

2.5

2.5

3.0

3.0

3.0

3.0

3.0

3.0

4.5

4.5

4.5

4.5

1966

4.5

4.5

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

1967

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

1968

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

1969

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

1970

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.7

4.9

4.9

1971

4.9

4.9

4.9

4.9

4.9

4.9

4.9

4.9

4.9

4.9

4.9

5.0

1972

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

1973

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

1974

5.1

5.1

5.1

5.1

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

1975

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

1976

5.2

5.2

5.2

5.2

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

1977

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

1978

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

1979

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

5.3

1

2

3

4

5

6

7

8

9

10

11

12

1980

5.3

5.3

5.3

5.3

5.4

5.4

5.4

5.4

5.4

5.4

5.4

5.4

1981

5.4

5.4

5.4

5.4

5.4

5.5

5.5

5.5

5.5

5.5

5.5

5.5

1982

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.6

5.6

5.6

1983

5.6

5.6

5.6

5.6

5.6

5.6

5.6

5.6

5.6

5.6

5.6

5.6

1984

5.6

5.6

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.7

1985

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.8

5.8

1986

5.8

5.8

5.8

5.8

5.8

5.8

5.8

5.8

6.0

6.0

6.0

6.0

1987

6.0

6.0

6.0

6.0

6.0

6.1

6.1

6.1

6.1

6.1

6.1

6.1

1988

6.1

6.1

6.1

6.1

6.1

6.1

6.1

6.1

6.1

6.1

6.1

6.1

1989

6.1

6.2

6.2

6.2

6.2

6.2

6.2

6.2

6.2

6.2

6.3

6.3

1990

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.3

1991

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.4

6.4

6.4

1992

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

1993

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.5

1994

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

1

2

3

4

5

6

7

8

9

10

11

12

1995

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

1996

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.6

1997

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

1998

6.6

6.6

6.6

6.6

6.6

6.4

6.4

6.4

6.4

6.4

6.4

6.4

1999

6.4

6.4

6.4

6.4

6.4

6.5

6.5

6.5

6.5

6.5

6.5

6.5

2000

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

2001

6.5

6.5

6.5

6.5

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

2002

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

2003

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.7

6.7

2004

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.6

6.6

6.6

2005

6.6

6.6

6.6

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

2006

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.2

2007

7.2

7.2

7.2

7.3

7.3

7.3

7.2

7.2

7.2

7.2

7.2

7.2

2008

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

2009

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

1

2

3

4

5

6

7

8

9

10

11

12

2010

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

2011

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

2012

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

2013

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

2014

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

1

2

3

4

5

6

7

8

9

10

11

12

2015

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

2016

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

2017

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

2018

7.4

7.4

7.4

7.4

7.4