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:
| Lift Name | Type | Top\nelevation\n(ft) | Bottom\nelevation | Vertical\nrise | Length\n(ft) | Slope\n(%) | Capacity\n(rides/hr) | Speed\n(ft/min) | Lift\nManufacturer | Year\ninstalled |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Bruno | fixed double | 5,885 | 5,840 | 45 | 368 | 12% | 630 | 300 | Poma | 1987 |
| Molly's Express | detach quad | 5,835 | 4,990 | 845 | 5,244 | 16% | 1200 | 1000 | Doppelmayr | 2000 |
| Pucci | fixed triple | 5,920 | 5,350 | 570 | 3,398 | 17% | 1,330 | 450 | Poma | 1987 |
| Stormin' Norman | detach quad | 6,245 | 5,460 | 785 | 4,396 | 18% | 1500 | 1000 | Doppelmayr | 2000 |
| Magic Mile Express | detach quad | 6,990 | 5,915 | 1,075 | 5,359 | 20% | 1600 | 950 | Poma | 1992 |
| Palmer Express | detach quad | 8,470 | 6,940 | 1,530 | 5,468 | 29% | 1800 | 1000 | Doppelmayr | 1996 |
| Jeff Flood Express (Still Creek Basin) | detach quad | 6,020 | 4,850 | 1,170 | 6,506 | 18% | 1800 | 1000 | Doppelmayr | 2007 |
Question:
how many lifts were installed after 1991?
Answer:
5