Table:
household income
percentage
mean number of hours

less than $20,000
33
182

$20,000 to $39,999
34
172

$40,000 to $59,999
37
165

$60,000 to $79,999
41
179

$80,000 to $99,999
44
148

$100,000 to $119,999
50
171

$120,000 and over
52
130

Regarding the table displayed, can you identify how many rows and columns it has? Provide the final answer in the JSON structure, using the format {"row_number": "m", "column_number": "n"}.

This table has 8 rows and 3 columns. Thus, the final answer is {"row_number": "8", "column_number": "3"}.