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<br /> <br /> SO HIGH PLAINS STATES 100 <br /> NATIONAL <br /> '10 80 <br />-;;;- <br />~ ~ <br />~ <br />~ ~ <br />~ ~ <br />0 ~ <br />0 30 80 ~ <br /> 0 <br />~ 0 <br />w ~ <br />~ - ~ <br /> \ 2! <br />~ " <br />I- <br />= ~ <br />~ 20 '10 <br />.... ~ <br /> .... <br /> 10 20 <br /> <br /> <br /> <br />1890 <br /> <br />1900 <br /> <br />1910 <br /> <br />1920 <br /> <br />1930 <br /> <br />19'10 <br /> <br />19S0 <br /> <br />1960 <br /> <br />1970 <br /> <br />1980 <br /> <br />YEAR <br /> <br />NATIONAL ANO REGIONAL REAL <br />COAL PRICES (F,O.B, MINE) <br /> <br />FIGURE 3-1 <br /> <br /> 100 HATlOHAL 200 <br /> HIGH PLAIHS STATES <br /> 80 I 180 <br /> I <br /> I <br />;;; ;;; <br />~ ~ <br />~ ~ <br />~ ~ <br />g 60 120 ~ <br /> 0 <br /> 0 <br />~ ~ <br />l!? ~ <br /> !!! <br />.. ~ <br /> 80 I- <br />.~ 140 ~ <br /> ,. <br />:;; - <br /> .... <br /> 20 '10 <br /> <br />1890 <br /> <br />1900 <br /> <br />1910 <br /> <br />1920 <br /> <br />1930 19'10 <br />YEAR <br />NATIONAL AND REGIONAL REAL CRUDE PETROLEUM <br />PRICES (AT WELLHEAO IN U.S. AMD REFINER <br />AQUISITION ~OST FOR IMPORTS) <br /> <br />1950 <br /> <br />1980 <br /> <br />1970 <br /> <br />1980 <br /> <br />3-2 <br /> <br />FIGURE 3-2 <br />