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:
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents in the final | Score in the final |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Winner | 1. | 12 March 1978 | Dallas | Carpet | Martina Navratilova | Evonne Goolagong\n Betty Stöve | 6–3, 7–6 |
| Runner-up | 1. | 1 October 1978 | Atlanta | Carpet | Martina Navratilova | Françoise Dürr\n Virginia Wade | 6–4, 2–6, 4–6 |
| Runner-up | 2. | 8 October 1978 | Phoenix | Hard | Martina Navratilova | Tracy Austin\n Betty Stöve | 4–6, 7–6, 2–6 |
| Winner | 2. | 12 November 1978 | Oldsmar | Hard | Martina Navratilova | Kerry Reid\n Wendy Turnbull | 7–6, 6–3 |
| Runner-up | 3. | 18 February 1979 | Los Angeles | Hard (i) | Martina Navratilova | Rosemary Casals\n Chris Evert | 4–6, 6–1, 3–6 |
| Winner | 3. | 4 March 1979 | Dallas | Carpet | Martina Navratilova | Rosemary Casals\n Chris Evert | 7–6, 6–2 |
| Winner | 4. | 12 August 1979 | Indianapolis | Clay | Kathy Jordan | Penny Johnson\n Paula Smith | 6–1, 6–0 |
| Runner-up | 4. | 29 September 1979 | Atlanta | Carpet | Ann Kiyomura | Betty Stöve\n Wendy Turnbull | 2–6, 4–6 |
| Winner | 5. | 28 October 1979 | Tampa | Hard | Virginia Ruzici | Ilana Kloss\n Betty-Ann Stuart | 7–5, 4–6, 7–5 |
| Winner | 6. | 25 November 1979 | Brighton | Carpet | Ann Kiyomura | Ilana Kloss\n Laura duPont | 6–2, 6–1 |
| Runner-up | 5. | 2 December 1979 | Melbourne | Grass | Dianne Fromholtz | Billie Jean King\n Wendy Turnbull | 3–6, 3–6 |
| Runner-up | 6. | 10 February 1980 | Los Angeles | Hard (i) | Kathy Jordan | Rosemary Casals\n Martina Navratilova | 6–7, 2–6 |
| Runner-up | 7. | 24 February 1980 | Detroit | Carpet | Kathy Jordan | Billie Jean King\n Ilana Kloss | 6–3, 3–6, 2–6 |
| Winner | 7. | 13 April 1980 | Hilton Head | Clay | Kathy Jordan | Candy Reynolds\n Paula Smith | 6–2, 6–1 |
| Winner | 8. | 7 June 1980 | French Open | Clay | Kathy Jordan | Ivanna Madruga\n Adriana Villagran | 6–1, 6–0 |
| Winner | 9. | 21 June 1980 | Eastbourne | Grass | Kathy Jordan | Pam Shriver\n Betty Stöve | 6–4, 6–1 |
| Winner | 10. | 5 July 1980 | Wimbledon | Grass | Kathy Jordan | Rosemary Casals\n Wendy Turnbull | 4–6, 7–5, 6–1 |
| Winner | 11. | 20 July 1980 | Montreal | Hard | Pam Shriver | Ann Kiyomura\n Greer Stevens | 3–6, 6–6 ret. |
| Runner-up | 8. | 27 July 1980 | Richmond | Carpet | Pam Shriver | Billie Jean King\n Martina Navratilova | 4–6, 6–4, 3–6 |
| Winner | 12. | 10 August 1980 | Indianapolis | Clay | Paula Smith | Virginia Ruzici\n Renáta Tomanová | 4–6, 6–3, 6–4 |
| Winner | 13. | 21 September 1980 | Las Vegas | Hard (i) | Kathy Jordan | Martina Navratilova\n Betty Stöve | 2–6, 6–4, 6–3 |
| Runner-up | 9. | 28 September 1980 | Atlanta | Carpet | Kathy Jordan | Barbara Potter\n Sharon Walsh | 3–6, 1–6 |
| Runner-up | 10. | 5 October 1980 | Minneapolis | Carpet | Paula Smith | Ann Kiyomura\n Candy Reynolds | 3–6, 6–4, 1–6 |
| Winner | 14. | 26 October 1980 | Brighton | Carpet | Kathy Jordan | Martina Navratilova\n Betty Stöve | 6–3, 7–5 |
| Runner-up | 11. | 9 November 1980 | Filderstadt | Hard (i) | Kathy Jordan | Hana Mandlíková\n Betty Stöve | 4–6, 5–7 |
| Runner-up | 12. | 16 November 1980 | Tampa | Hard | Paula Smith | Rosemary Casals\n Candy Reynolds | 6–7, 5–7 |
| Winner | 15. | 25 January 1981 | Cincinnati | Carpet | Kathy Jordan | Martina Navratilova\n Pam Shriver | 1–6, 6–3, 6–3 |
| Runner-up | 13. | 15 March 1981 | Dallas | Carpet | Kathy Jordan | Martina Navratilova\n Pam Shriver | 5–7, 4–6 |
| Runner-up | 14. | 21 June 1981 | Eastbourne | Grass | Kathy Jordan | Martina Navratilova\n Pam Shriver | 7–6, 2–6, 1–6 |
| Runner-up | 15. | 3 July 1981 | Wimbledon | Grass | Kathy Jordan | Martina Navratilova\n Pam Shriver | 3–6, 6–7(6) |
| Runner-up | 16. | 16 August 1981 | Richmond | Carpet | Kathy Jordan | Sue Barker\n Ann Kiyomura | 6–4, 6–7, 4–6 |
| Runner-up | 17. | 23 August 1981 | Toronto | Hard | Candy Reynolds | Martina Navratilova\n Pam Shriver | 6–7, 6–7 |
| Winner | 16. | 12 September 1981 | US Open | Hard | Kathy Jordan | Rosemary Casals\n Wendy Turnbull | 6–3, 6–3 |
| Winner | 17. | 25 October 1981 | Brighton | Carpet | Barbara Potter | Mima Jaušovec\n Pam Shriver | 6–7, 6–3, 6–4 |
| Runner-up | 18. | 1 November 1981 | Filderstadt | Hard (i) | Barbara Potter | Mima Jaušovec\n Martina Navratilova | 4–6, 1–6 |
| Runner-up | 19. | 29 November 1981 | Sydney | Grass | Kathy Jordan | Martina Navratilova\n Pam Shriver | 7–6, 2–6, 4–6 |
| Winner | 18. | 5 December 1981 | Australian Open | Grass | Kathy Jordan | Martina Navratilova\n Pam Shriver | 6–2, 7–5 |
| Winner | 19. | 10 January 1982 | Washington, D.C. | Carpet | Kathy Jordan | Martina Navratilova\n Pam Shriver | 6–2, 3–6, 6–1 |
| Runner-up | 20. | 17 January 1982 | Cincinnati | Carpet | Pam Shriver | Sue Barker\n Ann Kiyomura | 2–6, 6–7 |
| Runner-up | 21. | 24 January 1982 | Seattle | Carpet | Kathy Jordan | Rosemary Casals\n Wendy Turnbull | 5–7, 4–6 |
| Runner-up | 22. | 14 February 1982 | Kansas City | Carpet | Mary Lou Piatek | Barbara Potter\n Sharon Walsh | 6–4, 2–6, 2–6 |
| Winner | 20. | 7 March 1982 | Los Angeles | Carpet | Kathy Jordan | Barbara Potter\n Sharon Walsh | 6–3, 7–5 |
| Winner | 21. | 20 March 1982 | Boston | Carpet | Kathy Jordan | Rosemary Casals\n Wendy Turnbull | 7–6, 2–6, 6–4 |
| Runner-up | 23. | 28 March 1982 | New York City | Carpet | Kathy Jordan | Martina Navratilova\n Pam Shriver | 4–6, 3–6 |
| Runner-up | 24. | 18 April 1982 | Fort Worth | Clay | Kathy Jordan | Martina Navratilova\n Pam Shriver | 5–7, 3–6 |
| Runner-up | 25. | 2 May 1982 | Orlando | Clay | Kathy Jordan | Rosemary Casals\n Wendy Turnbull | 3–6, 3–6 |
| Winner | 22. | 5 June 1982 | French Open | Clay | Martina Navratilova | Rosemary Casals\n Wendy Turnbull | 6–3, 6–4 |
| Runner-up | 26. | 20 June 1982 | Eastbourne | Grass | Kathy Jordan | Martina Navratilova\n Pam Shriver | 3–6, 4–6 |
| Runner-up | 27. | 3 July 1982 | Wimbledon | Grass | Kathy Jordan | Martina Navratilova\n Pam Shriver | 4–6, 1–6 |
| Runner-up | 28. | 24 October 1982 | Filderstadt | Hard (i) | Candy Reynolds | Martina Navratilova\n Pam Shriver | 2–6, 3–6 |
| Winner | 23. | 21 November 1982 | Brisbane | Grass | Billie Jean King | Claudia Kohde-Kilsch\n Eva Pfaff | 6–3, 6–4 |
| Runner-up | 29. | 10 January 1983 | Washington, D.C. | Carpet | Kathy Jordan | Martina Navratilova\n Pam Shriver | 6–4, 5–7, 3–6 |
| Runner-up | 30. | 20 February 1983 | Chicago | Carpet | Kathy Jordan | Martina Navratilova\n Pam Shriver | 1–6, 2–6 |
| Runner-up | 31. | 20 March 1983 | Boston | Carpet | Kathy Jordan | Jo Durie\n Ann Kiyomura | 3–6, 1–6 |
| Runner-up | 32. | 3 April 1983 | Tokyo | Carpet | Kathy Jordan | Billie Jean King\n Sharon Walsh | 1–6, 1–6 |
| Winner | 24. | 24 April 1983 | Orlando | Clay | Billie Jean King | Martina Navratilova\n Pam Shriver | 6–3, 1–6, 7–6 |
| Runner-up | 33. | 4 June 1983 | French Open | Clay | Kathy Jordan | Rosalyn Fairbank\n Candy Reynolds | 7–5, 5–7, 2–6 |
| Winner | 25. | 22 April 1984 | Amelia Island | Clay | Kathy Jordan | Anne Hobbs\n Mima Jaušovec | 6–4, 3–6, 6–4 |
| Runner-up | 34. | 7 July 1984 | Wimbledon | Grass | Kathy Jordan | Martina Navratilova\n Pam Shriver | 3–6, 4–6 |
| Winner | 26. | 31 March 1985 | Palm Beach Gardens | Clay | Joanne Russell | Laura Arraya\n Gabriela Sabatini | 1–6, 6–1, 7–6(4) |
| Runner-up | 35. | 26 January 1986 | Wichita | Carpet | Joanne Russell | Kathy Jordan\n Candy Reynolds | 3–6, 7–6(5), 3–6 |
| Winner | 27. | 9 March 1986 | Hershey | Carpet | Candy Reynolds | Sandy Collins\n Kim Sands | 7–6(8), 6–1 |
| Winner | 28. | 5 October 1986 | New Orleans | Carpet | Candy Reynolds | Svetlana Parkhomenko\n Larisa Savchenko | 6–3, 3–6, 6–3 |
| Runner-up | 36. | 2 November 1986 | Indianapolis | Hard (i) | Candy Reynolds | Zina Garrison\n Lori McNeil | 5–4 ret. |
| Winner | 29. | 18 February 1990 | Chicago | Carpet | Martina Navratilova | Arantxa Sánchez Vicario\n Nathalie Tauziat | 6–7(9), 6–4, 6–3 |
| Runner-up | 37. | 22 July 1990 | Newport | Grass | Patty Fendick | Lise Gregory\n Gretchen Magers | 6–7(7), 1–6 |
| Winner | 30. | 12 August 1990 | Albuquerque | Hard | Meredith McGrath | Mareen Louie-Harper\n Wendy White | 7–6(2), 6–4 |
| Winner | 31. | 4 November 1990 | Oakland | Carpet | Meredith McGrath | Rosalyn Fairbank\n Robin White | 2–6, 6–0, 6–4 |
| Winner | 32. | 24 February 1991 | Oklahoma City | Hard (i) | Meredith McGrath | Katrina Adams\n Jill Hetherington | 6–2, 6–4 |
Question:
tell me the number of grass courts.
Answer:
10