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 |
| --- | --- | --- | --- | --- | --- |
| 1969.0 | 125cc | Maico | 4.0 | 40th | 0.0 |
| 1969.0 | 250cc | Yamaha | 45.0 | 5th | 0.0 |
| 1970.0 | 125cc | Maico | 62.0 | 3rd | 0.0 |
| 1970.0 | 250cc | Yamaha | 34.0 | 5th | 0.0 |
| 1971.0 | 125cc | Maico | 64.0 | 3rd | 0.0 |
| 1971.0 | 250cc | Yamaha | 9.0 | 21st | 0.0 |
| 1972.0 | 50cc | Jamathi | 10.0 | 12th | 0.0 |
| 1972.0 | 125cc | Maico | 78.0 | 4th | 2.0 |
| 1972.0 | 250cc | Yamaha | 36.0 | 8th | 1.0 |
| 1973.0 | 125cc | Maico | 64.0 | 4th | 1.0 |
| 1973.0 | 250cc | Yamaha | 12.0 | 18th | 0.0 |
Question:
What is the earliest year with less than 45 points for Yamaha team in 21st rank?
Answer:
1971.0