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:
| Goal | Date | Venue | Opponent | Score | Result | Competition |
| --- | --- | --- | --- | --- | --- | --- |
| 1. | 24 January 2007 | Estadio Cuscatlán, San Salvador, El Salvador | Denmark | 1–0 | 1–0 | Friendly |
| 2. | 8 February 2007 | Estadio Cuscatlán, San Salvador, El Salvador | Belize | 2–0 | 2–1 | 2007 UNCAF Nations Cup |
| 3. | 10 February 2007 | Estadio Cuscatlán, San Salvador, El Salvador | Nicaragua | 1–0 | 2–1 | 2007 UNCAF Nations Cup |
| 4. | 10 February 2007 | Estadio Cuscatlán, San Salvador, El Salvador | Nicaragua | 2–1 | 2–1 | 2007 UNCAF Nations Cup |
| 5. | 8 September 2007 | Estadio Olímpico Atahualpa, Quito, Ecuador | Ecuador | 1–2 | 1–5 | Friendly |
| 6. | 13 October 2007 | Estadio Cuscatlán, San Salvador, El Salvador | Costa Rica | 1–2 | 2–2 | Friendly |
| 7. | 6 February 2008 | Estadio Cuscatlán, San Salvador, El Salvador | Anguilla | 9–0 | 12–0 | 2010 FIFA World Cup qualification |
| 8. | 22 June 2008 | Estadio Cuscatlán, San Salvador, El Salvador | Panama | 1–1 | 3–1 | 2010 FIFA World Cup qualification |
| 9. | 22 June 2008 | Estadio Cuscatlán, San Salvador, El Salvador | Panama | 2–1 | 3–1 | 2010 FIFA World Cup qualification |
| 10. | 15 October 2008 | Estadio Cuscatlán, San Salvador, El Salvador | Suriname | 2–0 | 3–0 | 2010 FIFA World Cup qualification |
| 11. | 22 October 2008 | Robert F. Kennedy Stadium, Washington, D.C., United States | Bolivia | 1–0 | 2–0 | Friendly |
| 12. | 28 March 2009 | Estadio Cuscatlán, San Salvador, El Salvador | United States | 1–0 | 2–2 | 2010 FIFA World Cup qualification |
| 13. | 6 June 2009 | Estadio Cuscatlán, San Salvador, El Salvador | Mexico | 2–1 | 2–1 | 2010 FIFA World Cup qualification |
| 14. | 3 March 2010 | Los Angeles Coliseum, Los Angeles, United States | Guatemala | 2–1 | 2–1 | Friendly |
| 15. | 12 June 2011 | Soldier Field, Chicago, United States | Cuba | 6–1 | 6–1 | 2011 CONCACAF Gold Cup |
Question:
how many competitions had a score of 1-0 at most?
Answer:
4