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 | Title | Lead vocalist | ARIA chart position | Album |
| --- | --- | --- | --- | --- |
| 1985 | "Time Out (For Serious Fun)" | Sandi Chick | N/A | - |
| 1985 | "Sweat It Out" | Peter Blakeley | N/A | - |
| 1987 | "Rhymes" | John Kenny | N/A | Tales of the City |
| 1987 | "New Groove" | John Kenny | N/A | Tales of the City |
| 1988 | "What's It Gonna Be" | John Kenny | N/A | Tales of the City |
| 1988 | "Jump" | Wendy Matthews | N/A | Tales of the City |
| 1988 | "Dreams in the Empty City" | John Kenny | N/A | Tales of the City |
| 1988 | "Boogietron" | Ensemble | N/A | Tales of the City |
| 1991 | "Ain't No Sunshine" | Deni Hines | 5 | Form 1 Planet |
| 1992 | "That Word (L.O.V.E.)" | Deni Hines | 4 | Form 1 Planet |
| 1992 | "It's Not Over" | Deni Hines | 15 | Form 1 Planet |
| 1992 | "Stronger Together" | Doug Williams | - | Form 1 Planet |
| 1992 | "Love's Gonna Bring You Home" | Doug Williams | - | Form 1 Planet |
| 1993 | "Form One Planet" | Eric Sebastian | - | Form 1 Planet |
| 2002 | "All I Want Is You" | Jeremy Gregory | 41 | Rockies 3 |
| 2002 | "I Ain't Playin'" | Roxane LeBrasse | 79 | Rockies 3 |
| 2002 | "Police Woman 2002" (with Groove Quantize) | N/A | - | - |
Question:
how long did they produce singles?
Answer:
17 years