Total Number of Bomb Attacks 1969-81
Jan
Feb
Mar
Apr
May
June
July
Aug
Sep
Oct
Nov
Dec
1969
0
2
4
1
1970
11
12
13
17
29
20
27
18
7
1971
24
87
58
54
72
85
113
195
255
230
162
180
1972
187
179
165
142
128
232
130
119
92
1973
82
109
146
118
152
171
114
121
101
136
182
88
1974
102
135
157
83
126
97
86
67
64
71
1975
45
77
34
31
33
99
75
1976
144
78
76
108
124
94
51
73
1977
79
41
53
14
9
90
1978
104
60
19
48
43
40
26
125
1979
23
57
74
55
28
61
25
1980
56
52
44
6
1981
36
139
37
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