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:
| Flight | Date | Payload nickname | Payload | Orbit | Result |
| --- | --- | --- | --- | --- | --- |
| TF1 (Test Flight) | February 4, 1994 | Ryūsei | OREX (Orbital Re-entry Experiment) | LEO | Success |
| TF1 (Test Flight) | February 4, 1994 | Myōjō | VEP (Vehicle Evaluation Payload) | GTO | Success |
| TF2 | August 28, 1994 | Kiku 6 | ETS-VI (Engineering Test Satellite-VI) | GEO | Success |
| TF3 | March 18, 1995 | Himawari 5 | GMS-5 (Geostationary Meteorological Satellite-5) | GEO | Success |
| TF3 | March 18, 1995 |  | SFU (Space Flyer Unit) | LEO | Success |
| F4 | August 17, 1996 | Midori | ADEOS (Advanced Earth Observing Satellite) | LEO | Success |
| F4 | August 17, 1996 | Fuji 3 | Fuji OSCAR 29, JAS-2 | LEO | Success |
| F6 | November 27, 1997 |  | TRMM (Tropical Rainfall Measuring Mission) | LEO | Success |
| F6 | November 27, 1997 | Kiku 7 (Orihime & Hikoboshi) | ETS-VII (Engineering Test Satellite-VII) | LEO | Success |
| F5 | February 21, 1998 | Kakehashi | COMETS (Communications and Broadcasting Engineering Test Satellites) | GEO | Partial failure |
| F8 | November 15, 1999 |  | MTSAT (Multi-functional Transport Satellite) | GEO | Failure |
| F7 | Canceled | Midori II | ADEOS-II (Advanced Earth Observing Satellite II) |  | Canceled |
| F7 | Canceled |  | μ-LabSat |  | Canceled |
Question:
how many years passed between flight tf2 and flight f8?
Answer:
5