user
Instruction
Answer the question based on the provided table.


Table
Table Title: number and percentage of female breast cancer tumours diagnosed among patients aged 19 or older with at least one surgical treatment within one year of diagnosis, by age group and province or territory, canada (excluding quebec), 2010 to 2012
Table Content:
<table border="1" cellspacing="0">
<tr> <td rowspan="3">  </td> <td colspan="3"> 19 to 49 years </td> <td colspan="3"> 50 to 69 years </td> <td colspan="3"> 70 years and older </td> </tr>
<tr> <td>  </td> <td colspan="2"> tumours with one or more surgical intervention </td> <td>  </td> <td colspan="2"> tumours with one or more surgical intervention </td> <td>  </td> <td colspan="2"> tumours with one or more surgical intervention </td> </tr>
<tr> <td> number </td> <td> number </td> <td> percent </td> <td> number </td> <td> number </td> <td> percent </td> <td> number </td> <td> number </td> <td> percent </td> </tr>
<tr> <td> canada </td> <td> 10,300 </td> <td> 9,355 </td> <td> 90.8 </td> <td> 25,255 </td> <td> 23,020 </td> <td> 91.1 </td> <td> 14,150 </td> <td> 11,930 </td> <td> 84.3 </td> </tr>
<tr> <td>  </td> <td> 190 </td> <td> 190 </td> <td> 98.4 </td> <td> 560 </td> <td> 530 </td> <td> 94.3 </td> <td> 290 </td> <td> 245 </td> <td> 84.1 </td> </tr>
<tr> <td> prince edward island </td> <td> 40 </td> <td> 40 </td> <td> 97.7 </td> <td> 180 </td> <td> 170 </td> <td> 94.9 </td> <td> 100 </td> <td> 85 </td> <td> 87.6 </td> </tr>
<tr> <td> nova scotia </td> <td> 405 </td> <td> 385 </td> <td> 95.0 </td> <td> 1,030 </td> <td> 970 </td> <td> 94.4 </td> <td> 600 </td> <td> 500 </td> <td> 82.6 </td> </tr>
<tr> <td> new brunswick </td> <td> 250 </td> <td> 240 </td> <td> 97.6 </td> <td> 790 </td> <td> 755 </td> <td> 95.3 </td> <td> 490 </td> <td> 410 </td> <td> 83.1 </td> </tr>
<tr> <td> ontario </td> <td> 5,530 </td> <td> 4,890 </td> <td> 88.3 </td> <td> 12,930 </td> <td> 11,550 </td> <td> 89.3 </td> <td> 7,165 </td> <td> 5,915 </td> <td> 82.5 </td> </tr>
<tr> <td> manitoba </td> <td> 430 </td> <td> 390 </td> <td> 90.9 </td> <td> 1,180 </td> <td> 1,050 </td> <td> 89.0 </td> <td> 710 </td> <td> 580 </td> <td> 81.4 </td> </tr>
<tr> <td> saskatchewan </td> <td> 295 </td> <td> 270 </td> <td> 91.5 </td> <td> 915 </td> <td> 860 </td> <td> 94.0 </td> <td> 665 </td> <td> 580 </td> <td> 86.8 </td> </tr>
<tr> <td> alberta </td> <td> 1,420 </td> <td> 1,315 </td> <td> 92.6 </td> <td> 3,075 </td> <td> 2,825 </td> <td> 91.8 </td> <td> 1,585 </td> <td> 1,380 </td> <td> 86.9 </td> </tr>
<tr> <td> british columbia </td> <td> 1,715 </td> <td> 1,620 </td> <td> 94.2 </td> <td> 4,520 </td> <td> 4,240 </td> <td> 93.9 </td> <td> 2,520 </td> <td> 2,230 </td> <td> 88.6 </td> </tr>
<tr> <td> yukon </td> <td> 10 </td> <td> 10 </td> <td> 83.3 </td> <td> 30 </td> <td> 30 </td> <td> 90.6 </td> <td> 15 </td> <td> 10 </td> <td> 69.2 </td> </tr>
<tr> <td> northwest territories </td> <td> x </td> <td> x </td> <td> 81.3 </td> <td> 40 </td> <td> 35 </td> <td> 91.9 </td> <td> x </td> <td> x </td> <td> 71.4 </td> </tr>
<tr> <td> nunavut </td> <td> x </td> <td> x </td> <td> 80.0 </td> <td> 10 </td> <td> 10 </td> <td> 100.0 </td> <td> x </td> <td> x </td> <td> 100.0 </td> </tr>
</table>


Question
which age group of women has the highest surgical rates?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["50 to 69 years"]