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Date
Reported cases of whooping cough in the US
2
1920null
3
1922107473
4
1923164191
5
1924165418
6
1925152003
7
1926202210
8
1927181411
9
1928161799
10
1929197371
11
1930166914
12
1931172559
13
1932215343
14
1933179135
15
1934265269
16
1935180518
17
1936147237
18
1937214652
19
1938227319
20
1939103188
21
1940183866
22
1941222202
23
1942191383
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1943191890
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1944109873
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1945133792
27
1946109860
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1947156517
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194874715
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194969479
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1950120718
32
195168687
33
195245030
34
195337129
35
195460886
36
195562786
37
195631732
38
195728295
39
195832148
40
195940005
41
196014809
42
196111468
43
196217749
44
196317135
45
196413005
46
19656799
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19667717
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19679718
49
19684810
50
19693285
51
19704249
52
19713036
53
19723287
54
19731759
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19742402
56
19751738
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19761010
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19772177
59
19782063
60
19791623
61
19801730
62
19811248
63
19821895
64
19832463
65
19842276
66
19853589
67
19864195
68
19872823
69
19883450
70
19894157
71
19904570
72
19912719
73
19924083
74
19936586
75
19944617
76
19955137
77
19967796
78
19976564
79
19987405
80
19997298
81
20007867
82
20017580
83
20029771
84
200311651
85
200425827
86
200525619
87
200615631
88
200710454
89
200813278
90
200916858
91
201027550
92
201118719
93
201248277
94
201328639
95
201428660
96
97
98
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100
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