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:
| Res. | Record | Opponent | Method | Event | Round | Time | Location |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Win | 29-7-2 | Thomas Denny | KO (punches) | IFL 11 | 2.0 | 0:50 | Illinois , United States |
| Loss | 28-7-2 | Renzo Gracie | Submission (guillotine choke) | IFL 9 | 1.0 | 3:37 | Illinois , United States |
| Loss | 28-6-2 | Matt Lindland | TKO (punches) | UFC 36 | 1.0 | 3:09 | Nevada , United States |
| Win | 28-5-2 | Shonie Carter | KO (head kick) | UFC 32 | 2.0 | 2:42 | New Jersey , United States |
| Loss | 27-5-2 | Carlos Newton | Submission (bulldog choke) | UFC 31 | 3.0 | 2:50 | New Jersey , United States |
| Win | 27-4-2 | Kenichi Yamamoto | Submission (guillotine choke) | UFC 29 | 2.0 | 1:58 | Tokyo , Japan |
| Loss | 26-4-2 | Kiyoshi Tamura | Decision (majority) | Rings: Millennium Combine 3 | 2.0 | 5:00 | Yokohama , Japan |
| Win | 26-3-2 | John Alessio | Submission (armbar) | UFC 26 | 2.0 | 1:43 | Iowa , United States |
| Loss | 25-3-2 | José Landi-Jons | TKO (corner stoppage) | WEF 8 | 1.0 | 8:00 | Georgia , United States |
| Win | 25-2-2 | Shonie Carter | Decision (unanimous) | EC 27 | 1.0 | 20:00 | Iowa , United States |
| Win | 24-2-2 | André Pederneiras | TKO (cut) | UFC 21 | 2.0 | 2:20 | Iowa , United States |
| Win | 23-2-2 | Clayton Miller | Submission (triangle choke) | CC 2 | 1.0 | 0:40 | Iowa , United States |
| Loss | 22-2-2 | Jutaro Nakao | Submission (triangle choke) | SB 11 | 1.0 | 9:22 | Hawaii , United States |
| Win | 22-1-2 | Jorge Patino | Decision (unanimous) | UFC 18 | 1.0 | 21:00 | Louisiana , United States |
| Win | 21-1-2 | Mikey Burnett | Decision (split) | UFC 17.5 | 1.0 | 21:00 | Sao Paulo , Brazil |
| Draw | 20-1-2 | Dan Severn | Draw | EC 20 | 1.0 | 20:00 | Iowa , United States |
| Win | 20-1-1 | Al Buck Jr. | Submission (choke) | WEF 5 | 2.0 | 2:49 | Iowa , United States |
| Win | 19-1-1 | Chris Brennan | Submission (shoulder choke) | UFC 16 | 1.0 | 9:02 | Louisiana , United States |
| Win | 18-1-1 | Townsend Saunders | Decision (split) | UFC 16 | 1.0 | 15:00 | Louisiana , United States |
| Win | 17-1-1 | Chris Brennan | Decision (unanimous) | EC 12 | 1.0 | 10:00 | Iowa , United States |
| Draw | 16-1-1 | Chris Brennan | Draw (majority) | EC 9 | 1.0 | 20:00 | Iowa , United States |
| Win | 16-1 | Chuck Kim | Submission (rear-naked choke) | EC 7 | 1.0 | 10:46 | Iowa , United States |
| Loss | 15-1 | Matt Hume | TKO (doctor stoppage) | EC 4 | 1.0 | 5:00 | Iowa , United States |
| Win | 15-0 | Chad Cox | Submission (punch) | EC 3 | 1.0 | 1:84 | Iowa , United States |
| Win | 14-0 | Paul Kimbrel | Submission (armbar) | EC 2 | 1.0 | 5:13 | Iowa , United States |
| Win | 13-0 | Jason Nicholson | Decision (unanimous) | SB 3 | 1.0 | 15:00 | Hawaii , United States |
| Win | 12-0 | Earl Loucks | Submission (keylock) | EC 1 | 1.0 | 7:00 | Iowa , United States |
| Win | 11-0 | Pat Assalone | Submission (armbar) | SB 1 | 1.0 | 4:01 | Iowa , United States |
| Win | 10-0 | Matt Andersen | Submission (punches) | WEF 3 | 1.0 | 5:21 | Iowa , United States |
| Win | 9-0 | Yasunori Matsumoto | TKO (doctor stoppage) | WEF 2 | 1.0 | 15:53 | Illinois , United States |
| Win | 8-0 | Andrey Dudko | Submission (rear-naked choke) | BM 2 | 1.0 | 2:49 | Illinois , United States |
| Win | 7-0 | Bob Gholson | KO (punches) | BM 2 | 1.0 | 2:20 | Illinois , United States |
| Win | 6-0 | Rick Graveson | Submission (rear-naked choke) | BM 2 | 1.0 | 0:46 | Illinois , United States |
| Win | 5-0 | Rick Graveson | Submission (rear-naked choke) | WEF 1 | 1.0 | 1:53 | Illinois , United States |
| Win | 4-0 | Ed McLennan | Submission (armbar) | WEF 1 | 1.0 | 1:28 | Illinois , United States |
| Win | 3-0 | Kevin Marino | Submission (rear-naked choke) | BM 1 | 1.0 | 3:49 | Illinois , United States |
| Win | 2-0 | Angelo Rivera | Submission (rear-naked choke) | BM 1 | 1.0 | 1:40 | Illinois , United States |
| Win | 1-0 | Yasunori Matsumoto | Submission (rear-naked choke) | BM 1 | 1.0 | 7:40 | Illinois , United States |
Question:
How many total rounds used the submission (choke) method?
Answer:
2.0