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:
| Political parties | % 2006 | Seats 2006 | % 2001 | Seats 2001 | % 1997 |
| --- | --- | --- | --- | --- | --- |
| Social Democratic Party of Germany | 43.5 | 5.0 | 38.8 | 4.0 | 46.6 |
| Christian Democratic Union | 33.7 | 3.0 | 35.7 | 4.0 | 38.9 |
| Free Democratic Party | 8.4 | 1.0 | 16.7 | 2.0 | 4.2 |
| The Republicans | 7.7 | 1.0 | 7.0 | 1.0 | 0 |
| Alliance '90/The Greens | 6.7 | 1.0 | 1.7 | 0.0 | 10.2 |
| Total | 100.0 | 11.0 | 100.0 | 11.0 | 100.0 |
Question:
How many political parties had a %2006 rating of 43.5?
Answer:
1.0