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   2015 (7 publications)    2014 (1607 publications)    2013 (3907 publications)
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   2006 (5562 publications)    2005 (5680 publications)    2004 (5168 publications)
   2003 (4929 publications)    2002 (4671 publications)    2001 (4201 publications)
   2000 (3822 publications)    1999 (3423 publications)    1998 (873 publications)
   1997 (666 publications)    1996 (605 publications)    1995 (484 publications)
   1994 (439 publications)    1993 (386 publications)    1992 (343 publications)
   1991 (303 publications)    1990 (277 publications)    1989 (229 publications)
   1988 (198 publications)    1987 (173 publications)    1986 (161 publications)
   1985 (138 publications)    1984 (85 publications)    1983 (107 publications)
   1982 (82 publications)    1981 (64 publications)    1980 (61 publications)
   1979 (52 publications)    1978 (51 publications)    1977 (48 publications)
   1976 (35 publications)    1975 (34 publications)    1974 (19 publications)
   1973 (25 publications)    1972 (26 publications)    1971 (25 publications)
   1970 (19 publications)    1969 (15 publications)    1968 (16 publications)
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