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View History:
Monthly
Annual
Download Data (XLS File)
U.S. Offshore Crude Oil and Natural Gas Rotary Rigs in Operation (Number of Elements)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1973
99
89
90
79
72
76
81
82
83
84
86
87
1974
89
91
95
101
94
90
93
92
90
91
99
103
1975
94
93
102
102
102
106
109
112
113
112
113
116
1976
123
126
132
124
121
120
132
128
126
128
137
145
1977
146
166
163
162
169
169
172
178
178
169
168
168
1978
172
181
180
182
183
184
185
198
194
190
187
188
1979
207
206
203
207
198
205
205
208
215
211
205
216
1980
219
216
219
222
229
235
235
235
231
232
247
250
1981
245
234
252
256
249
246
262
264
266
264
270
283
1982
280
269
262
251
251
248
242
235
228
229
214
214
1983
218
216
210
213
209
202
178
181
175
177
159
210
1984
216
202
198
203
202
205
206
216
214
223
232
242
1985
242
233
223
210
200
203
194
197
197
195
187
190
1986
175
164
132
112
94
73
65
65
74
80
79
89
1987
88
75
76
73
76
85
97
109
114
116
118
128
1988
127
123
119
117
123
124
126
123
122
122
129
127
1989
110
95
93
92
92
103
114
114
107
106
119
117
1990
113
105
108
111
120
113
108
108
107
99
106
101
1991
91
88
81
95
98
93
80
68
71
68
72
65
1992
56
51
54
55
47
44
48
51
45
53
60
59
1993
72
69
62
69
73
83
85
87
89
93
99
103
1994
99
95
99
106
104
113
107
95
97
99
106
107
1995
106
100
90
91
100
96
104
103
103
105
104
109
1996
111
102
96
113
116
112
107
108
109
108
107
116
1997
110
107
127
126
120
121
125
125
128
121
126
129
1998
133
139
136
138
133
128
121
118
118
111
109
102
1999
104
101
106
99
102
100
99
106
109
111
119
122
2000
125
122
124
125
139
139
158
159
146
147
151
147
2001
174
163
167
169
171
163
157
147
144
133
134
123
2002
126
123
114
105
105
110
111
111
114
111
109
114
2003
111
110
105
106
113
109
107
111
109
105
106
104
2004
100
99
94
93
96
96
97
95
92
95
102
106
2005
102
106
97
93
91
96
101
102
91
87
84
77
2006
77
79
88
95
100
95
94
99
93
90
87
84
2007
84
85
81
75
77
79
79
73
65
49
61
62
2008
60
56
60
64
68
67
67
67
72
73
63
66
2009
66
57
46
48
54
47
38
31
-
= No Data Reported;
--
= Not Applicable;
NA
= Not Available;
W
= Withheld to avoid disclosure of individual company data.
Release Date: 10/8/2009
Next Release Date: 11/6/2009
Referring Pages:
Crude Oil and Natural Gas Drilling Activity