Concepto	Año	Otorgados	Superficie concesionada (miles de hectáreas)
Exploración	1993	2,084	1,504.10
	1994	1,532	1,834.57
	1995	1,076	1,944.18
	1996	1,095	2,814.99
	1997	1,453	8,915.58
	1998	1,656	6,244.95
	1999	1,394	6,672.15
	2000	1,265	4,644.20
	2001	1,719	2,334.90
	2002	2,545	4,703.70
	2003	1,683	1,723.80
	2004	1,608	2,710.40
	2005	2,113	6,038.80
Explotación	1993	676	241.60
	1994	862	274.13
	1995	440	265.12
	1996	426	278.41
	1997	653	990.62
	1998	854	933.15
	1999	598	824.65
	2000	635	295.30
	2001	451	224.60
	2002	1,216	939.90
	2003	877	654.50
	2004	587	429.90
	2005	791	595.80
Total	1993	2,760	1,745.70
	1994	2,394	2,108.70
	1995	1,516	2,209.30
	1996	1,521	3,093.40
	1997	2,106	9,906.20
	1998	2,510	7,178.10
	1999	1,992	7,496.80
	2000	1,900	4,939.50
	2001	2,170	2,559.50
	2002	3,761	5,643.60
	2003	2,560	2,378.30
	2004	2,195	3,140.30
	2005	2,904	6,634.60
	2006	2,284	4,773.80
	2007	2,423	8,377.90
	2008	2,152	6,147.00
	2009	2,327	7,411.00
	2010	2,007	4,011.30
	2011	2,022	4,429.00
	2012	2,005	5,426.00
	2013	1,154	2,168.60
	2014	360	334.50