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:
| Event | Bowling center | City | Dates | Winner |
| --- | --- | --- | --- | --- |
| Eastern Open | Edison Lanes | Edison, New Jersey | Dec 2–6 | Dennis Chapis (2) |
| Charlotte Open | Freedom Lanes | Charlotte, North Carolina | Dec 9–13 | Gene Rhoda (3) |
| Western Open | Saratoga Lanes | San Jose, California | Jan 4–8 | Jim Godman (1) |
| Denver Open | Broadway Bowl | Denver, Colorado | Jan 11–15 | Dick Weber (16) |
| Hialeah-Miami Open | Hialeah Lanes | Hialeah, Florida | Feb 1–5 | Les Schissler (3) |
| Mobile-Sertoma Open | Florida Lanes | Mobile, Alabama | Feb 8–12 | Mike Limongello (2) |
| Fresno Open | Sunnyside Bowl | Fresno, California | Feb 15–19 | Dick Weber (17) |
| Las Vegas Open | Showboat Lanes | Las Vegas, Nevada | Feb 22–26 | Skee Foremsky (1) |
| Miller High Life Open | Bowlero Lanes | Milwaukee, Wisconsin | Mar 1–5 | Bill Lillard (1) |
| St. Paul Open | All-Star Bowl | St. Paul, Minnesota | Mar 8–12 | Gene Rhoda (4) |
| Buckeye Open | Imperial Lanes | Toledo, Ohio | Mar 15–19 | Pete Tountas (2) |
| Greater Buffalo Open | Fairlanes | Depew, New York | Mar 22–26 | Bobby Jacks (1) |
| Firestone Tournament of Champions | Riviera Lanes | Akron, Ohio | Mar 29 – Apr 2 | Wayne Zahn (4) |
| Seattle Open | Ballinger Bowl | Seattle, Washington | Jun 9–12 | Wayne Zahn (5) |
| Portland Open | Valley Lanes | Portland, Oregon | Jun 16–19 | Don Johnson (2) |
| Fresno Open | Cedar Lanes | Fresno, California | Jun 22–26 | Les Schissler (4) |
| Tucson Squirt Open | Cactus Bowl | Tucson, Arizona | Jul 1–4 | Johnny Guenther (2) |
| Southern California Open | Encino Bowl | Encino, California | Jul 7–10 | Barry Asher (1) |
| Fort Worth Open | Meadowbrook Lanes | Fort Worth, Texas | Jul 14–17 | Dick Ritger (1) |
| Reading Open | Hiester Lanes | Reading, Pennsylvania | Jul 28–31 | Dick Ritger (2) |
| U.S. Coast Guard Open | Starlite Lanes | Grand Haven, Michigan | Aug 2–5 | George Howard (4) |
| Brockton Open | Westgate Lanes | Brockton, Massachusetts | Aug 11–14 | Bobby Jacks (2) |
| Waukegan Open | Bertrand Bowl | Waukegan, Illinois | Aug 18–21 | Bobby Jacks (3) |
| Fort Smith Open | Midland Bowl | Fort Smith, Arkansas | Aug 25–28 | Johnny Petraglia (1) |
| Labor Day Classic | Hart Bowl | Dallas, Texas | Sep 2–5 | Bud Horn (1) |
| Crescent City Open | Mardi Gras Bowl | New Orleans, Louisiana | Sep 8–12 | Barry Asher (2) |
| Seventh Annual PBA National Championship | Garden City Bowl | Garden City, New York | Nov 1–6 | Wayne Zahn (6) |
| Camden PBA Open | Camden Lanes | Camden, New Jersey | Nov 9–12 | Ralph Engan (1) |
| Baltimore Open | Fair Lanes-Colt | Baltimore, Maryland | Nov 17–20 | Jim Stefanich (1) |
Question:
what were the dates of the last event of the year?
Answer:
Nov 17-20