Drilling Commenced (Wells Spudded)
- by Year

As of November 22, 2009

Year	Wells Spudded
2009	444
2008	1144
2007	1136
2006	1067
2005	890
2004	660
2003	480
2002	391
2001	630
2000	540
1999	283
1998	430
1997	430
1996	280
1995	242
1994	223
1993	137
1992	382
1991	258
1990	107
1989	96
1988	114
1987	136
1986	150
1985	316

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