Spot prices are unaudited and do not reflect Production Tax Settlement Values
$ per barrel (million barrels/day)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1988 | $14.23 | $14.03 | $13.79 | $15.29 | $14.86 | $14.14 | $13.70 | $13.63 | $12.58 | $11.34 | $11.36 | $13.23 |
| 1989 | $15.11 | $15.99 | $17.25 | $19.37 | $17.64 | $17.00 | $16.78 | $16.04 | $16.62 | $17.27 | $17.49 | $19.07 |
| 1990 | $20.00 | $19.30 | $17.91 | $14.82 | $14.38 | $13.20 | $15.55 | $25.99 | $32.16 | $31.53 | $28.79 | $24.02 |
| 1991 | $20.57 | $15.74 | $17.02 | $17.56 | $16.67 | $16.36 | $17.25 | $17.18 | $17.37 | $18.47 | $17.57 | $14.83 |
| 1992 | $14.92 | $15.30 | $15.50 | $16.96 | $18.03 | $20.20 | $19.40 | $17.97 | $18.46 | $18.71 | $17.46 | $16.33 |
| 1993 | $15.62 | $16.78 | $17.35 | $18.17 | $17.47 | $16.02 | $14.84 | $15.42 | $14.98 | $15.39 | $13.07 | $10.29 |
| 1994 | $11.66 | $12.59 | $12.91 | $14.96 | $16.47 | $16.43 | $16.52 | $16.66 | $16.11 | $16.02 | $16.71 | $15.38 |
| 1995 | $16.16 | $17.14 | $17.31 | $18.36 | $18.43 | $17.43 | $16.23 | $16.72 | $16.65 | $15.96 | $15.88 | $16.94 |
| 1996 | $17.23 | $17.78 | $20.40 | $22.04 | $19.65 | $18.98 | $19.79 | $19.90 | $21.69 | $22.60 | $21.50 | $23.66 |
| 1997 | $23.57 | $21.03 | $20.07 | $18.54 | $19.41 | $17.30 | $17.48 | $17.98 | $18.09 | $19.59 | $18.33 | $16.39 |
| 1998 | $14.79 | $13.39 | $12.25 | $12.41 | $12.31 | $11.62 | $12.92 | $12.49 | $14.13 | $13.38 | $11.47 | $9.39 |
| 1999 | $10.69 | $10.43 | $13.07 | $15.64 | $15.86 | $15.82 | $18.16 | $20.08 | $22.96 | $21.83 | $23.65 | $24.54 |
| 2000 | $25.74 | $27.65 | $28.01 | $23.83 | $27.15 | $29.62 | $27.63 | $29.40 | $32.25 | $31.56 | $32.74 | $23.72 |
| 2001 | $24.37 | $26.02 | $24.70 | $25.55 | $26.70 | $25.82 | $24.60 | $24.12 | $23.21 | $19.45 | $17.23 | $16.69 |
| 2002 | $17.52 | $19.14 | $22.76 | $24.99 | $25.87 | $24.16 | $25.82 | $27.39 | $28.76 | $27.53 | $24.69 | $28.03 |
| 2003 | $31.91 | $35.20 | $32.59 | $25.59 | $26.19 | $29.35 | $29.17 | $30.22 | $27.09 | $28.55 | $29.11 | $30.67 |
| 2004 | $33.10 | $33.66 | $35.50 | $35.43 | $39.07 | $36.73 | $39.44 | $43.12 | $42.71 | $48.56 | $42.15 | $36.66 |
| 2005 | $41.12 | $43.59 | $50.63 | $49.75 | $46.77 | $53.67 | $56.67 | $62.40 | $63.47 | $60.37 | $56.11 | $57.17 |
| 2006 | $62.85 | $59.26 | $60.61 | $67.74 | $69.32 | $69.50 | $73.10 | $71.74 | $62.33 | $54.27 | $54.26 | $58.13 |
| 2007 | $51.52 | $57.00 | $59.01 | $63.92 | $64.76 | $69.11 | $75.93 | $73.83 | $79.72 | $84.77 | $92.98 | $88.64 |
| 2008 | $91.16 | $94.42 | $105.06 | $112.37 | $125.41 | $133.78 | $132.87 | $115.98 | $101.86 | $73.65 | $53.94 | $37.70 |
| 2009 | $39.01 | $42.78 | $47.75 | $46.56 | $58.23 | $69.80 | $64.53 | $71.52 | $69.20 | $74.28 | $76.52 | $75.12 |
| 2010 | $79.34 | $76.74 | $79.45 | $82.23 | $74.23 | $75.66 | $76.53 | $75.78 | $75.27 | $82.41 | $83.93 | $89.75 |
| 2011 | $92.56 | $96.79 | $115.34 | $120.86 | $113.57 | $111.08 | $114.47 | $106.95 | $113.74 | $110.84 | $115.58 | $106.55 |
| 2012 | | | | | | | | | | | | |
| 2013 | | | | | | | | | | | | |