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 | Album | Label | Peak chart\npositions\nUS | Peak chart\npositions\nUS R&B |
| --- | --- | --- | --- | --- |
| 1969 | Gimme Shelter | Ode | — | — |
| 1971 | Celebration | Ode | — | — |
| 1971 | Merry Clayton | Ode | 180 | 36 |
| 1975 | Keep Your Eye on the Sparrow | Ode | 146 | 50 |
| 1979 | Emotion | Fontana | — | — |
| 1994 | Miracles | A&M | — | — |
Question:
how long is the period between the first and last album in the table?
Answer:
25 years