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:
| No. | Player | Position | Career | Date No. Retired |
| --- | --- | --- | --- | --- |
| 1 | Eddie Giacomin | G | 1965–76 | March 15, 1989 |
| 2 | Brian Leetch | D | 1987–2004 | January 24, 2008 |
| 3 | Harry Howell | D | 1952–69 | February 22, 2009 |
| 7 | Rod Gilbert | RW | 1960–78 | October 14, 1979 |
| 9 1 | Andy Bathgate | C | 1954–64 | February 22, 2009 |
| 9 1 | Adam Graves | LW | 1991–2001 | February 3, 2009 |
| 11 | Mark Messier | C | 1991–97, 2000–04 | January 12, 2006 |
| 35 | Mike Richter | G | 1990–2003 | February 4, 2004 |
| 99 2 | Wayne Gretzky | C | 1996–99 | February 6, 2000 |
Question:
how long was gretzky's career?
Answer:
3 years