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 | Order | Quantity | GER Nos. |
| --- | --- | --- | --- |
| 1893 | N31 | 1 | 999 |
| 1893 | H33 | 10 | 979–988 |
| 1894 | L33 | 10 | 989–998 |
| 1894 | E34 | 10 | 969–978 |
| 1896 | N37 | 10 | 959–968 |
| 1897 | H40 | 10 | 949–958 |
| 1897 | O41 | 10 | 602–608, 946–948 |
| 1898 | G42 | 10 | 542–551 |
| 1898 | K43 | 10 | 562–571 |
Question:
how many years are listed?
Answer:
5