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 | Championship | Winning score | Margin | Runner(s)-up |
| --- | --- | --- | --- | --- |
| 1979.0 | Peter Jackson Classic | −7 (75-70-70-70=285) | 3 strokes | Nancy Lopez |
| 1980.0 | U.S. Women's Open | −4 (70-70-68-72=280) | 9 strokes | Hollis Stacy |
| 1983.0 | Nabisco Dinah Shore | −6 (70-70-70-72=282) | 2 strokes | Beth Daniel , Kathy Whitworth |
| 1988.0 | Nabisco Dinah Shore | −14 (71-66-66-71=274) | 2 strokes | Colleen Walker |
| 1991.0 | Nabisco Dinah Shore | −15 (67-70-68-68=273) | 8 strokes | Dottie Mochrie |
Question:
How many years was there a peter jackson classic?
Answer:
1.0