Table:
age groups
%

15 to 24
88.1

25 to 34
95.2

35 to 44
92.5

45 to 54
87.3

55 to 64
78.9

65 and over
63.5

household income quartile

quartile 1 lowest household income
70.2

quartile 2
81.8

quartile 3
88.8

quartile 4 highest household income
93.5

Tell me the row and column numbers of the shown table. Output the final answer in the JSON format {"row_number": "m", "column_number": "n"}. For instance, if the table has 5 rows and 4 columns, the answer would be {"row_number": "5", "column_number": "4"}

This table has 12 rows and 2 columns. Thus, the final answer is {"row_number": "12", "column_number": "2"}.