Link to Series in Level 1 Subscription Site
Link to Series in Level 2 Subscription Site
Link to Series in Level 0 Subscription Site
 1975 01  512189·
 1976 01 7313038.
 1977 01  4113980.
 1978 01 1215511·
 1979 01  1217446·
 1980 01 7019009.
 1981 01  1720444.
 1982 01 1421192·
 1983 01  322217.
 1984 01 8324457.
 1985 01  1225782.
 1986 01 3427001.
 1987 01  3027870·
 1988 01 9528836·
 1989 01  3931086·
 1990 01 1531761·
 1991 01  6832253·
 1992 01 1333324.
 1993 01  3833739.
 1994 01 2734452.
 1995 01  1735979.
 1996 01 6837125·
 1997 01  6939162.
 1998 01 6440983.

 1999 01  342565.
 2000 01 1644915·
 2001 01  2245087.
 2002 01 4545143.
 2003 01  7546820·
 2004 01 4047651·
 2005 01  850002.
 2006 01 1452249.
 2007 01  1154138.
 2008 01 4755085.
 2009 01  6753833·
 2010 01 4053142·

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