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 | Class | Team | Points | Rank | Wins |
| --- | --- | --- | --- | --- | --- |
| 1968.0 | 500cc | Matchless | 0.0 | – | 0.0 |
| 1969.0 | 350cc | AJS | 0.0 | – | 0.0 |
| 1969.0 | 500cc | Metisse | 3.0 | 46th | 0.0 |
| 1970.0 | 500cc | Matchless | 8.0 | 23rd | 0.0 |
| 1971.0 | 350cc | AJS | 16.0 | 13th | 0.0 |
| 1971.0 | 500cc | AJS | 0.0 | – | 0.0 |
| 1972.0 | 250cc | Yamaha | 10.0 | 18th | 0.0 |
| 1972.0 | 350cc | Honda | 0.0 | – | 0.0 |
| 1972.0 | 500cc | Matchless | 0.0 | – | 0.0 |
| 1973.0 | 250cc | Yamaha | 12.0 | 17th | 0.0 |
| 1973.0 | 350cc | Yamaha | 10.0 | 20th | 0.0 |
| 1973.0 | 500cc | Matchless | 0.0 | – | 0.0 |
| 1974.0 | 250cc | Yamaha | 2.0 | 38th | 0.0 |
| 1974.0 | 350cc | Yamaha | 7.0 | 29th | 0.0 |
| 1974.0 | 500cc | Yamaha | 18.0 | 11th | 0.0 |
| 1975.0 | 250cc | Yamaha | 15.0 | 14th | 0.0 |
| 1975.0 | 350cc | Yamaha | 1.0 | 47th | 0.0 |
| 1975.0 | 500cc | Yamaha | 32.0 | 5th | 0.0 |
| 1976.0 | 500cc | Suzuki | 24.0 | 9th | 1.0 |
| 1977.0 | 350cc | Yamaha | 10.0 | 22nd | 0.0 |
| 1977.0 | 500cc | Suzuki | 4.0 | 26th | 0.0 |
| 1978.0 | 500cc | Suzuki | 0.0 | – | 0.0 |
Question:
What was the last year that they had less than 16 points in class 500cc?
Answer:
1978.0