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United States
6,803
Agriculture
5,721
Labor supply
4,604
Housing
3,830
Wages
2,940
Education
2,571
Statistics
2,282
India
1,693
Industries
1,595
Women
1,501
Elections
1,293
Japan
1,186
Forests and forestry
1,166
Retail trade
1,164
Occupations
1,129
Finance, Public
1,106
Transportation
1,104
Households
1,098
Canada
1,068
Public health
1,018
Mortality
1,003
Groundwater
970
Manufactures
906
Wells
862
Fertility, Human
850
Health surveys
838
Income
818
English
101,234
Spanish
12,214
French
7,556
Japanese
3,577
Russian
3,570
German
3,243
Portuguese
2,550
Chinese
2,429
Indonesian
1,357
Italian
1,073
Swedish
707
Polish
663
Arabic
649
Norwegian
592
Dutch
554
Thai
526
Danish
465
Korean
425
Hungarian
402
Hindi
394
Hebrew
362
Turkish
362
Vietnamese
340
Finnish
233
Persian
232
Croatian
221
Afrikaans
204
Bulgarian
143
Malay
143
United States
65,820
Canada
4,835
India
4,813
United Kingdom
3,730
Japan
3,707
England
3,413
Mexico
2,963
France
2,906
Germany
2,250
Russia (Federation)
2,238
Brazil
2,128
China
1,692
Indonesia
1,482
Argentina
1,349
Italy
1,279
Australia
1,115
Luxembourg
1,071
Switzerland
1,048
Chile
1,042
Spain
880
Peru
811
Thailand
781
Pakistan
739
Sweden
690
Colombia
680
Poland
674
Netherlands
652
1990-1999
28,503
1980-1989
27,662
1970-1979
25,034
1900-1909
14,413
1900
13,352
2000-2009
12,642
1960-1969
10,561
1950-1959
4,633
1990
4,513
1993
3,299
1992
3,290
1989
3,280
1980
3,117
1983
2,996
1991
2,983
1994
2,977
1984
2,969
1985
2,832
1972
2,800
1995
2,733
1974
2,722
1973
2,708
1986
2,636
1987
2,627
1975
2,625
1970
2,607
1988
2,582
1940-1949
2,571
1979
2,411
1996
2,393
Book
95,479
Serial
42,473
Journal
40,696
Conference
2,192
Directories
872
Manuscript
643
Microform
394
Biography
164
CDROM
153
Dictionaries
108
Maps-Atlas
61
Map
57
Newspaper
50
Archive
12
Music
1
University of California
40,461
University of Michigan
31,846
University of Minnesota
12,902
The University of Texas
10,424
Cornell University
9,596
Indiana University
6,300
University of Virginia
5,302
New York Public Library
3,821
Northwestern University
2,722
Purdue University
1,902
Harvard University
1,771
Columbia University
1,212