Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Champion | Country | Venue | Location | Score | Winner's share ( $ ) |
| --- | --- | --- | --- | --- | --- | --- |
| 2013.0 | Kenny Perry | United States | Omaha Country Club | Omaha, Nebraska | 267 (−13) | 500000.0 |
| 2012.0 | Roger Chapman | England | Indianwood Golf and Country Club | Lake Orion, Michigan | 270 (−10) | 500000.0 |
| 2011.0 | Olin Browne | United States | Inverness Club | Toledo, Ohio | 269 (−15) | 500000.0 |
| 2010.0 | Bernhard Langer | Germany | Sahalee Country Club | Sammamish, Washington | 272 (−8) | 470000.0 |
| 2009.0 | Fred Funk | United States | Crooked Stick Golf Club | Carmel, Indiana | 268 (−20) | 470000.0 |
| 2008.0 | Eduardo Romero | Argentina | Broadmoor Golf Club | Colorado Springs, Colorado | 274 (−6) | 470000.0 |
| 2007.0 | Brad Bryant | United States | Whistling Straits , Straits Course | Haven, Wisconsin | 282 (−6) | 470000.0 |
| 2006.0 | Allen Doyle (2) | United States | Prairie Dunes Golf Club | Hutchinson, Kansas | 272 (−8) | 470000.0 |
| 2005.0 | Allen Doyle | United States | NCR Country Club , South Course | Kettering, Ohio | 274 (−10) | 470000.0 |
| 2004.0 | Peter Jacobsen | United States | Bellerive Country Club | St. Louis, Missouri | 272 (−12) | 470000.0 |
| 2003.0 | Bruce Lietzke | United States | Inverness Club | Toledo, Ohio | 207 (−6) | 470000.0 |
| 2002.0 | Don Pooley | United States | Caves Valley Golf Club | Owings Mills, Maryland | 274 (−10) | 450000.0 |
| 2001.0 | Bruce Fleisher | United States | Salem Country Club | Peabody, Massachusetts | 280 (E) | 430000.0 |
| 2000.0 | Hale Irwin (2) | United States | Saucon Valley Country Club , Old Course | Bethlehem, Pennsylvania | 267 (−17) | 400000.0 |
| 1999.0 | Dave Eichelberger | United States | Des Moines Golf and Country Club | West Des Moines, Iowa | 281 (−7) | 315000.0 |
| 1998.0 | Hale Irwin | United States | Riviera Country Club | Pacific Palisades, California | 285 (+1) | 267500.0 |
| 1997.0 | Graham Marsh | Australia | Olympia Fields Country Club | Olympia Fields, Illinois | 280 (E) | 232500.0 |
| 1996.0 | Dave Stockton | United States | Canterbury Golf Club | Beachwood, Ohio | 277 (−11) | 212500.0 |
| 1995.0 | Tom Weiskopf | United States | Congressional Country Club , Blue Course | Bethesda, Maryland | 275 (−13) | 175000.0 |
| 1994.0 | Simon Hobday | South Africa | Pinehurst Resort , No. 2 Course | Pinehurst, North Carolina | 274 (−10) | 145000.0 |
| 1993.0 | Jack Nicklaus (2) | United States | Cherry Hills Country Club | Cherry Hills Village, Colorado | 278 (−6) | 135330.0 |
| 1992.0 | Larry Laoretti | United States | Saucon Valley Country Club , Old Course | Bethlehem, Pennsylvania | 275 (−9) | 130000.0 |
| 1991.0 | Jack Nicklaus | United States | Oakland Hills Country Club , South Course | Birmingham, Michigan | 282 (+2) | 110000.0 |
| 1990.0 | Lee Trevino | United States | Ridgewood Country Club | Paramus, New Jersey | 275 (−13) | 90000.0 |
| 1989.0 | Orville Moody | United States | Laurel Valley Golf Club | Ligonier, Pennsylvania | 279 (−9) | 80000.0 |
| 1988.0 | Gary Player (2) | South Africa | Medinah Country Club , Course No. 3 | Medinah, Illinois | 288 (E) | 65000.0 |
| 1987.0 | Gary Player | South Africa | Brooklawn Country Club | Fairfield, Connecticut | 270 (−14) | 47000.0 |
| 1986.0 | Dale Douglass | United States | Scioto Country Club | Columbus, Ohio | 279 (−9) | 42500.0 |
| 1985.0 | Miller Barber (3) | United States | Edgewood Tahoe Golf Course | Stateline, Nevada | 285 (−3) | 40199.0 |
| 1984.0 | Miller Barber | United States | Oak Hill Country Club , East Course | Pittsford, New York | 286 (−2) | 36448.0 |
| 1983.0 | Billy Casper | United States | Hazeltine National Golf Club | Chaska, Minnesota | 288 (+4) | 30566.0 |
| 1982.0 | Miller Barber | United States | Portland Golf Club | Portland, Oregon | 282 (−2) | 28648.0 |
| 1981.0 | Arnold Palmer | United States | Oakland Hills Country Club , South Course | Birmingham, Michigan | 289 (+9) | 26000.0 |
| 1980.0 | Roberto De Vicenzo | Argentina | Winged Foot Golf Club , East Course | Mamaroneck, New York | 285 (+1) | 20000.0 |
Question:
What is the average winner's share won by Billy Casper?
Answer:
30566.0