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United States
6,741
Agriculture
5,677
Labor supply
4,594
Housing
3,815
Wages
2,929
Education
2,565
Statistics
2,234
India
1,684
Industries
1,585
Women
1,478
Elections
1,294
Japan
1,183
Forests and forestry
1,166
Retail trade
1,157
Occupations
1,124
Finance, Public
1,103
Transportation
1,100
Households
1,093
Canada
1,060
Public health
1,011
Mortality
1,002
Groundwater
969
Manufactures
902
Wells
862
Fertility, Human
846
Health surveys
834
Income
815
English
100,512
Spanish
12,169
French
7,517
Japanese
3,566
Russian
3,538
German
3,231
Portuguese
2,535
Chinese
2,417
Indonesian
1,341
Italian
1,069
Swedish
707
Polish
662
Arabic
639
Norwegian
591
Dutch
552
Thai
519
Danish
464
Korean
422
Hungarian
401
Hindi
391
Turkish
358
Hebrew
355
Vietnamese
337
Finnish
233
Persian
228
Croatian
221
Afrikaans
204
Bulgarian
142
Malay
142
United States
65,121
Canada
4,796
India
4,788
United Kingdom
3,719
Japan
3,693
England
3,403
Mexico
2,958
France
2,886
Germany
2,241
Russia (Federation)
2,210
Brazil
2,118
China
1,684
Indonesia
1,466
Argentina
1,342
Italy
1,268
Australia
1,111
Luxembourg
1,067
Chile
1,034
Switzerland
1,022
Spain
865
Peru
806
Thailand
767
Pakistan
738
Sweden
687
Colombia
677
Poland
673
Netherlands
649
1990-1999
28,419
1980-1989
27,553
1970-1979
24,908
1900-1909
14,282
1900
13,231
2000-2009
12,606
1960-1969
10,458
1950-1959
4,559
1990
4,504
1993
3,289
1992
3,280
1989
3,264
1980
3,106
1983
2,987
1991
2,969
1994
2,967
1984
2,958
1985
2,820
1972
2,787
1995
2,729
1974
2,711
1973
2,698
1986
2,630
1987
2,620
1975
2,614
1970
2,600
1988
2,569
1940-1949
2,505
1979
2,400
1996
2,388
Book
94,997
Serial
42,041
Journal
40,271
Conference
2,169
Directories
864
Manuscript
642
Microform
394
Biography
164
CDROM
151
Dictionaries
108
Maps-Atlas
61
Map
57
Newspaper
50
Archive
12
Music
1
University of California
40,197
University of Michigan
31,804
University of Minnesota
12,902
The University of Texas
10,424
Cornell University
8,801
Indiana University
6,301
University of Virginia
5,299
New York Public Library
3,756
Northwestern University
2,721
Harvard University
1,769
Purdue University
1,725
Columbia University
1,212