1982 | Interpolated | 185,263 | 192,982 | 0 | 0 | 192,982 | 23,085 | 23,085 | |
1983 | Micklewright, 1986 | 249,202 | 239,234 | 249,202 | 0 | 0 | 249,202 | 28,234 | 28,234 |
1984 | 301,697 | 289,629 | 301,697 | 0 | 0 | 301,697 | 34,534 | 34,534 | |
1985 | AWPI, 1997 | 328,677 | 315,530 | 328,677 | 0 | 0 | 328,677 | 41,773 | 41,773 |
1986 | 375,458 | 360,440 | 375,458 | 0 | 0 | 375,458 | 51,445 | 51,445 | |
1987 | 418,984 | 402,225 | 418,984 | 0 | 0 | 418,984 | 63,613 | 63,613 | |
1988 | 450,565 | 432,542 | 450,565 | 0 | 0 | 450,565 | 78,393 | 78,393 | |
1989 | 406,941 | 390,663 | 406,941 | 0 | 0 | 406,941 | 94,324 | 94,324 | |
1990 | AWPI, 1997 | 437,675 | 420,168 | 437,675 | 0 | 0 | 437,675 | 114,509 | 114,509 |
1991 | 424,370 | 407,395 | 424,370 | 0 | 0 | 424,370 | 136,067 | 136,067 | |
1992 | Interpolated | 447,437 | 429,540 | 447,437 | 0 | 0 | 447,437 | 160,079 | 160,079 |
1993 | AWPI, 1997 | 470,504 | 451,684 | 470,504 | 0 | 0 | 470,504 | 184,636 | 184,636 |
1994 | 496,883 | 477,008 | 496,883 | 0 | 0 | 496,883 | 208,884 | 208,884 | |
1995 | 450,596 | 432,572 | 450,596 | 0 | 0 | 450,596 | 230,578 | 230,578 | |
1996 | 467,855 | 449,141 | 467,855 | 0 | 0 | 467,855 | 252,573 | 252,573 | |
1997 | Micklewright, 1998 | 581,382 | 558,127 | 581,382 | 0 | 0 | 581,382 | 275,709 | 275,709 |
1998 | Calculated from 2005 survey of chemical suppliers (Table 3) | 540,204 | 562,713 | 0 | 0 | 562,713 | 294,857 | 294,857 | |
1999 | 588,427 | 612,944 | 0 | 0 | 612,944 | 314,037 | 314,037 | ||
2000 | 599,525 | 624,505 | 0 | 0 | 624,505 | 331,083 | 331,083 | ||
2001 | 571,134 | 594,931 | 0 | 0 | 594,931 | 346,856 | 346,856 | ||
2002 | 541,873 | 564,451 | 25,000 | 0 | 589,451 | 362,882 | 363,434 | ||
2003 | 505,603 | 526,670 | 50,000 | 0 | 576,670 | 379,233 | 380,336 | ||
2004 | 109,052 | 113,596 | 380,000 | 10,000 | 503,596 | 385,361 | 396,108 | ||
2005 | 85,000 | 427,500 | 10,000 | 522,500 | 401,985 | 413,395 | |||
2006 | 85,000 | 427,500 | 10,000 | 522,500 | 416,783 | 429,026 | |||
2007 | Vlosky est 608m cf water-borne |
| 85,000 | 475,000 | 10,000 | 570,000 | 426,453 | 443,728 | |
2008 | 85,000 | 475,000 | 20,000 | 580,000 | 426,162 | 454,971 | |||
2009 | 85,000 | 475,000 | 20,000 | 580,000 | 414,072 | 463,347 | |||
2010 | 85,000 | 475,000 | 20,000 | 580,000 | 392,167 | 469,737 | |||
2011 | 85,000 | 475,000 | 25,000 | 585,000 | 363,831 | 475,216 | |||
2012 | 85,000 | 475,000 | 25,000 | 585,000 | 332,006 | 480,227 | |||
2013 | 85,000 | 475,000 | 25,000 | 585,000 | 298,752 | 485,067 | |||
2014 | 85,000 | 475,000 | 25,000 | 585,000 | 265,480 | 489,701 | |||
2015 | 2016 Survey Value | 78,665 | 81,943 | 475,000 | 25,000 | 581,943 | 233,239 | 494,033 |