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:
| Superlative | Actress | Record Set | Year | Notes |
| --- | --- | --- | --- | --- |
| Most Awards | Katharine Hepburn | 4 awards | 1981.0 | Awards resulted from 12 nominations. |
| Most Nominations | Meryl Streep | 14 nominations | 2011.0 | Nominations resulted in 2 awards. |
| Oldest Winner | Jessica Tandy | 80 years old | 1989.0 | Driving Miss Daisy |
| Oldest Nominee | Emmanuelle Riva | 85 years old | 2012.0 | Amour |
| Youngest Winner | Marlee Matlin | 21 years old | 1986.0 | Children of a Lesser God |
| Youngest Nominee | Quvenzhané Wallis | 9 years old | 2012.0 | Beasts of the Southern Wild |
Question:
When was the last year when Katharine Hepburn won?
Answer:
1981.0