| 1 | A | B | C | D | E | F | G | H | I | J | K | L | M | N |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | singles |  |  |  |  |  |  |  |  |  |  |  |  |  |
| 3 | year | single | peak chart positions |  |  |  |  |  |  |  |  |  | certifications | album |
| 4 |  |  | ger | aut | can dance | spa | fin | fra | swe | swi | us | us dance |  |  |
| 5 | 1993 | groove me | - | - | - | - | 17 | - | - | - | - | - | none | nonstop |
| 6 |  | close to you | 19 | - | 1 | - | - | - | - | - | 46 | 22 | none |  |
| 7 | 1994 | take your chance | 18 | - | 5 | - | - | - | 35 | 37 | 88 | - | none |  |
| 8 |  | pain | 24 | 25 | - | - | 8 | - | 25 | - | - | - | none |  |
| 9 | 1995 | i wanna b with u | 11 | 18 | 2 | - | 12 | - | - | - | 45 | 10 | none | fun-tastic |
| 10 |  | celebration | 12 | - | 9 | 10 | - | 19 | - | - | 88 | - | none |  |
| 11 |  | doh wah diddy | 6 | 11 | 24 | 4 | - | 49 | - | - | - | - | ger: gold |  |
| 12 | 1996 | don't go away | 37 | 31 | - | 6 | - | - | - | - | 93 | - | none |  |
| 13 |  | i love you | - | 40 | - | - | - | - | - | - | - | - | none |  |
| 14 | 2015 | let's get crunk | - | - | - | - | - | - | - | - | - | - | none | back to the factory |
| 15 | 2016 | turn it up | - | - | - | - | - | - | - | - | - | - | none |  |
| 16 | "-" denotes single that did not chart |  |  |  |  |  |  |  |  |  |  |  |  |  |

Question: when did fun factory make the single "let's get crunk" of album "back to the factory"?
Answer: 2015