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:
| Title | Year | Peak chart positions\nUS | Peak chart positions\nUS\nAlt. | Peak chart positions\nUS\nMain. Rock | Peak chart positions\nAUS | Peak chart positions\nAUT | Peak chart positions\nFIN | Peak chart positions\nGER | Peak chart positions\nNLD | Peak chart positions\nSWI | Peak chart positions\nUK | Album |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| "Toxic" | 1999 | — | — | — | — | — | — | — | — | — | — | The Gift of Game |
| "Darkside" | 2000 | — | — | — | — | — | — | — | — | — | — | The Gift of Game |
| "Butterfly" | 2000 | 1 | 1 | 21 | 4 | 1 | 2 | 1 | 8 | 1 | 3 | The Gift of Game |
| "Revolving Door" | 2001 | — | — | — | 76 | 29 | 19 | 26 | 71 | 43 | 23 | The Gift of Game |
| "Drowning" | 2002 | — | 24 | 24 | — | 45 | — | 45 | — | — | 50 | Darkhorse |
| "Hurt You So Bad" | 2003 | — | — | — | — | — | — | — | — | — | — | Darkhorse |
Question:
how many times did the single "butterfly" rank as 1 in the chart?
Answer:
5