user
Instruction
Answer the question based on the provided table.


Table
Table Title: performance of imputation for experiments a and b
Table Content:
<table border="1" cellspacing="0">
<tr> <td rowspan="2"> experiment, and length of gap in years </td> <td> number of postal codes erased and imputed </td> <td> percentage of postal codes erased and imputed </td> <td> rule a applied </td> <td> rule b applied </td> <td> perfect matches </td> </tr>
<tr> <td> number </td> <td colspan="4"> percent </td> </tr>
<tr> <td> experiment a </td> <td colspan="5">  </td> </tr>
<tr> <td> 1 </td> <td> 1,572,760 </td> <td> 90.6 </td> <td> 91.6 </td> <td> 8.4 </td> <td> 77.0 </td> </tr>
<tr> <td> 2 </td> <td> 151,305 </td> <td> 8.7 </td> <td> 91.5 </td> <td> 8.5 </td> <td> 72.1 </td> </tr>
<tr> <td> 3 </td> <td> 10,815 </td> <td> 0.6 </td> <td> 75.9 </td> <td> 24.1 </td> <td> 56.5 </td> </tr>
<tr> <td> 4 </td> <td> 720 </td> <td> 0.0 </td> <td> 76.7 </td> <td> 23.3 </td> <td> 51.7 </td> </tr>
<tr> <td> 5 </td> <td> 20 </td> <td> 0.0 </td> <td> 60.0 </td> <td> 40.0 </td> <td> 35.0 </td> </tr>
<tr> <td> total - experiment a </td> <td> 1,735,620 </td> <td> 100.0 </td> <td> 91.5 </td> <td> 8.5 </td> <td> 76.4 </td> </tr>
<tr> <td> experiment b </td> <td colspan="5">  </td> </tr>
<tr> <td> 1 </td> <td> 2,830,755 </td> <td> 81.6 </td> <td> 91.4 </td> <td> 8.6 </td> <td> 76.8 </td> </tr>
<tr> <td> 2 </td> <td> 547,870 </td> <td> 15.8 </td> <td> 91.4 </td> <td> 8.6 </td> <td> 72.0 </td> </tr>
<tr> <td> 3 </td> <td> 78,510 </td> <td> 2.3 </td> <td> 76.1 </td> <td> 23.9 </td> <td> 56.8 </td> </tr>
<tr> <td> 4 </td> <td> 10,050 </td> <td> 0.3 </td> <td> 76.2 </td> <td> 23.8 </td> <td> 53.5 </td> </tr>
<tr> <td> 5 </td> <td> 1,090 </td> <td> 0.0 </td> <td> 58.2 </td> <td> 41.8 </td> <td> 38.0 </td> </tr>
<tr> <td> 6 </td> <td> 115 </td> <td> 0.0 </td> <td> 59.6 </td> <td> 40.3 </td> <td> 29.8 </td> </tr>
<tr> <td> 7 </td> <td> 15 </td> <td> 0.0 </td> <td> 64.3 </td> <td> 35.7 </td> <td> 35.7 </td> </tr>
<tr> <td> total - experiment b </td> <td> 3,468,405 </td> <td> 100.0 </td> <td> 91.0 </td> <td> 9.0 </td> <td> 75.5 </td> </tr>
</table>


Question
what is the overall percentage of perfectly matched postal codes?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["76.4"]