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| Midwest (PADD 2) Refinery and Blender Net Production of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1982 | -1 | |||||||||||
| 1983 | 1 | -1 | 67 | 0 | 72 | 0 | 0 | 25 | 15 | 0 | ||
| 1984 | 27 | 4 | 22 | 0 | 22 | 0 | 28 | 19 | 2 | 0 | 0 | 67 |
| 1985 | 1 | 0 | 36 | 0 | 5 | 12 | 0 | 0 | 15 | -24 | 47 | 7 |
| 1986 | 47 | -110 | -61 | -131 | -16 | 12 | -11 | -18 | 21 | -21 | 23 | 5 |
| 1987 | 42 | 49 | 27 | -28 | 13 | 15 | -4 | -10 | 52 | 7 | -6 | -31 |
| 1988 | 3 | -5 | 30 | 3 | 43 | 35 | 45 | 20 | -28 | -25 | 7 | -17 |
| 1989 | 3 | 26 | -129 | -27 | 45 | 36 | 26 | -23 | 32 | 12 | -8 | 75 |
| 1990 | 4 | 19 | 51 | 55 | 59 | 10 | -23 | 50 | 17 | 49 | 0 | 40 |
| 1991 | 15 | -3 | -49 | -113 | -45 | -59 | 18 | -99 | -25 | -26 | 9 | -48 |
| 1992 | 6 | 58 | 54 | 159 | 101 | -47 | 53 | 57 | 49 | 17 | 19 | 123 |
| 1993 | -3 | 93 | 157 | 100 | 41 | 80 | 16 | 70 | -10 | -3 | 44 | 137 |
| 1994 | 135 | 23 | 85 | 18 | -34 | 13 | 118 | 254 | -42 | -91 | 5 | 84 |
| 1995 | -66 | 17 | 98 | 86 | 97 | 86 | 182 | 105 | -37 | 215 | 30 | 42 |
| 1996 | 90 | -12 | 83 | -79 | 42 | 112 | 92 | 1 | 148 | 93 | 172 | 40 |
| 1997 | 63 | 30 | 69 | 166 | 115 | 78 | 94 | 110 | 93 | 54 | -3 | 47 |
| 1998 | -9 | -53 | 52 | 235 | 72 | 112 | 125 | 97 | -45 | -10 | -20 | 30 |
| 1999 | 78 | 118 | 17 | 126 | 148 | 21 | 68 | 60 | -110 | 12 | -102 | -13 |
| 2000 | -100 | 0 | -117 | -75 | -12 | -96 | -20 | -31 | -178 | 55 | 51 | -28 |
| 2001 | 71 | -18 | 93 | -36 | 102 | -13 | -85 | -84 | -107 | -208 | -113 | -202 |
| 2002 | -144 | -78 | -91 | -50 | -102 | -49 | -109 | -123 | -59 | -308 | -274 | -315 |
| 2003 | -82 | -232 | -212 | -227 | -115 | -25 | -58 | -66 | -24 | -200 | -255 | -153 |
| 2004 | -194 | -155 | -233 | -97 | -257 | -131 | -142 | -141 | 107 | -5 | 46 | 17 |
| 2005 | -103 | -172 | -114 | -220 | -275 | -192 | -173 | -77 | -272 | -282 | -1 | 0 |
| 2006 | 165 | 147 | -16 | 52 | 87 | 59 | 161 | 211 | 137 | 144 | 55 | 39 |
| 2007 | 90 | 92 | 122 | 101 | 54 | 164 | 55 | 11 | 98 | 57 | -87 | -86 |
| 2008 | -142 | -69 | -20 | 88 | 72 | 69 | -97 | -111 | -66 | -113 | 27 | -32 |
| 2009 | 46 | -50 | -24 | 104 | -31 | 33 | 24 | 26 | 24 | -58 | -22 | -56 |
| 2010 | 78 | 125 | -14 | -77 | -44 | -74 | 96 | 26 | -37 | 53 | 118 | -57 |
| 2011 | 34 | -3 | 82 | -18 | -115 | -4 | -102 | -90 | -52 | 48 | 70 | -17 |
| 2012 | 16 | 23 | 65 | 103 | 76 | -25 | -5 | 131 | 54 | 207 | 13 | -27 |
| 2013 | 29 | 70 | -40 | -8 | 23 | -65 | -70 | -96 | -124 | -77 | 10 | -120 |
| 2014 | -5 | -11 | -3 | 99 | 499 | 167 | -457 | -26 | -55 | -61 | -35 | -90 |
| 2015 | -92 | -22 | 32 | 49 | 35 | 176 | 38 | -31 | -209 | -311 | -40 | -165 |
| 2016 | -19 | -39 | -96 | -85 | -152 | -104 | -179 | -162 | -130 | -76 | -57 | -235 |
| 2017 | -238 | -108 | -180 | -32 | -123 | -135 | -121 | -210 | -129 | -94 | -257 | -183 |
| 2018 | -208 | -246 | -176 | -96 | -62 | -71 | -136 | -99 | -122 | -200 | -80 | -111 |
| 2019 | -82 | -35 | -159 | 36 | 102 | -16 | -164 | -144 | -39 | -151 | -115 | -240 |
| 2020 | -270 | -204 | -222 | -9 | -173 | -168 | -179 | -282 | -151 | -279 | -210 | -165 |
| 2021 | -74 | -105 | 8 | -54 | -156 | -178 | -198 | -226 | -245 | -286 | -271 | -196 |
| 2022 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2024 | -- | -- | -- | -- | -- | -- | ||||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 8/30/2024 |
| Next Release Date: 9/30/2024 |