Year

lnR

Year

lnR

Year

lnR

1953

7.232

1973

11.170

1993

9.403

1954

6.872

1974

9.278

1994

9.383

1955

6.691

1975

10.145

1995

8.897

1956

6.545

1976

10.931

1996

9.506

1957

6.736

1977

11.432

1997

8.958

1958

8.229

1978

11.453

1998

8.906

1959

8.548

1979

10.644

1999

7.844

1960

6.807

1980

12.588

2000

8.477

1961

6.412

1981

12.195

2001

8.414*

1962

6.103

1982

11.959

2002

7.687*

1963

5.652

1983

12.102

2003

7.592*

1964

5.153

1984

12.268

2004

7.352*

1965

4.963

1985

12.421

2005

8.338*

1966

5.136

1986

12.468

2006

7.903*

1967

5.380

1987

11.961

2007

7.994*

1968

5.649

1988

10.037

2008

8.501*

1969

6.180

1989

9.875

2009

8.149*

1970

7.363

1990

8.843

2010

9.919*

1971

9.133

1991

8.577

2011

9.125*

1972

7.462

1992

10.216

2012

9.776*