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:
| Name | Position | Period | Appearances¹ | Goals¹ | Nationality² |
| --- | --- | --- | --- | --- | --- |
| David N'Gog | Forward | 2006 – 2008 | 25.0 | 3.0 | France |
| Michel N'Gom | Attaquant | 1981 – 1984 | 90.0 | 26.0 | France |
| Bruno N'Gotty | Defender | 1995 – 1998 | 112.0 | 10.0 | France |
| Granddi Ngoyi | Midfielder | 2007 - 2011 | 35.0 | 0.0 | Democratic Republic of the Congo |
| Nenê | Midfielder | 2010 - 2013 | 112.0 | 58.0 | Brazil |
| Richard Niederbacher | Forward | 1984 – 1985 | 22.0 | 7.0 | Austria |
| William N'Jo Léa | Forward | 1984 – 1985 | 18.0 | 4.0 | France |
| Guy Nosibor | Forward | 1973 – 1977, 1978 – 1979 | 42.0 | 6.0 | France |
| Pascal Nouma | Forward | 1989 – 1992, 1994 – 1996 | 95.0 | 14.0 | France |
| Jacky Novi | Defender | 1974 – 1977 | 122.0 | 2.0 | France |
Question:
List the number of active years for attaquant.
Answer:
1981 – 1984