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:
| Date | Jurisdiction | Ronald Reagan | George H. W. Bush | John B. Anderson | Howard Baker | John Connally | Phil Crane | Bob Dole |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| January 21 | Iowa | 30% | 32% | 4% | 15% | 9% | 7% | 1% |
| February 17 | Puerto Rico | 0% | 60% | 0% | 37% | 1% | 0% | 0% |
| February 26 | New Hampshire | 50% | 23% | 10% | 13% | 2% | 2% | 0% |
| March 4 | Massachusetts | 29% | 31% | 31% | 5% | 1% | 1% | 0% |
| March 4 | Vermont | 30% | 22% | 29% | 12% | 1% | 2% | 0% |
| March 8 | South Carolina | 55% | 15% | 0% | 1% | 30% | 0% | 0% |
| March 11 | Alabama | 70% | 26% | 0% | 1% | 1% | 2% | 0% |
| March 11 | Florida | 56% | 30% | 9% | 1% | 1% | 2% | 0% |
| March 11 | Georgia | 73% | 13% | 8% | 1% | 1% | 3% | 0% |
| March 18 | Illinois | 49% | 11% | 36% | 1% | 0% | 2% | 0% |
| March 25 | Connecticut | 34% | 39% | 22% | 1% | 0% | 1% | 0% |
| April 1 | Kansas | 63% | 13% | 18% | 1% | 1% | 0% | 0% |
| April 1 | Wisconsin | 40% | 30% | 27% | 0% | 0% | 0% | 0% |
| April 5 | Louisiana | 74% | 19% | 0% | 0% | 0% | 0% | 0% |
| April 22 | Pennsylvania | 43% | 50% | 2% | 3% | 1% | 0% | 0% |
| May 3 | Texas | 53% | 46% | 0% | 0% | 0% | 0% | 0% |
| May 6 | Washington, D.C. | 0% | 66% | 27% | 0% | 0% | 4% | 0% |
| May 6 | Indiana | 74% | 16% | 10% | 0% | 0% | 4% | 0% |
| May 6 | North Carolina | 68% | 22% | 5% | 2% | 0% | 1% | 0% |
| May 6 | Tennessee | 74% | 18% | 4% | 0% | 0% | 1% | 0% |
| May 13 | Maryland | 48% | 41% | 10% | 0% | 0% | 1% | 0% |
| May 13 | Nebraska | 76% | 15% | 6% | 0% | 0% | 1% | 1% |
| May 20 | Michigan | 32% | 57% | 8% | 0% | 0% | 1% | 1% |
| May 20 | Oregon | 54% | 35% | 10% | 0% | 0% | 1% | 0% |
| May 27 | Idaho | 83% | 4% | 10% | 0% | 0% | 1% | 0% |
| May 27 | Kentucky | 82% | 7% | 5% | 0% | 0% | 0% | 0% |
| May 27 | Nevada | 83% | 4% | 10% | 0% | 0% | 1% | 0% |
| June 3 | California | 80% | 5% | 14% | 0% | 0% | 1% | 0% |
| June 3 | Mississippi | 89% | 8% | 0% | 0% | 0% | 0% | 0% |
| June 3 | Montana | 87% | 10% | 0% | 0% | 0% | 0% | 0% |
| June 3 | New Jersey | 81% | 17% | 0% | 0% | 0% | 0% | 0% |
| June 3 | New Mexico | 64% | 10% | 12% | 0% | 0% | 7% | 0% |
| June 3 | Ohio | 81% | 19% | 0% | 0% | 0% | 0% | 0% |
| June 3 | Rhode Island | 72% | 19% | 0% | 0% | 0% | 0% | 0% |
| June 3 | South Dakota | 88% | 4% | 0% | 0% | 0% | 0% | 0% |
| June 3 | West Virginia | 84% | 14% | 0% | 0% | 0% | 0% | 0% |
Question:
Name the date for oregon jurisdiction
Answer:
May 20