Summary statistics tables.

 
Table S1. Crude Oil and Petroleum Products Overview, 1988-Present 
 
(Thousand Barrels per Day, Except Where Noted) 
 
                                  Field Production 
 
                                                    Natural 
                         Total         Crude       Gas Plant 
    Year/Month        Domestic (c)      Oil         Liquids 
 
1988 Average                9,818         8,140        1,625 
1989 Average                9,219         7,613        1,546 
1990 Average ...