Table:
1999
2012

have an resp
mean value of resps
have an resp
mean value of resps

proportion
2012 constant dollars
proportion
2012 constant dollars

overall
0.159
1,325
0.467
6,878

after-tax income quintile

bottom
0.098
746
0.253
2,072

second
0.134
888
0.360
3,676

third
0.177
1,271
0.460
5,162

fourth
0.226
2,404
0.585
7,535

top
0.318
3,134
0.679
15,915

net worth (less resps) quintile

bottom
0.066
397
0.195
831

second
0.139
668
0.341
2,061

third
0.160
1,136
0.455
3,972

fourth
0.238
2,285
0.613
8,755

top
0.327
4,879
0.732
18,752

highest parental education

no high school diploma
0.048
214
0.120
389

high school diploma
0.117
660
0.213
3,398

non-university postsecondary certificate
0.141
1,181
0.403
4,574

bachelor's degree
0.246
2,089
0.620
8,551

above a bachelor's degree
0.299
3,032
0.688
14,266

age of oldest parent

under 30 years old
0.098
220
0.254
778

30 to 34 years
0.170
699
0.378
2,512

35 to 39 years
0.157
1,231
0.493
5,341

40 to 44 years
0.156
1,344
0.522
6,716

45 to 49 years
0.184
2,214
0.495
8,754

50 to 54 years
0.176
2,330
0.507
14,287

55 years old or over
0.163
1,320
0.464
10,326

married or common-law couple
0.178
1,489
0.510
7,658

lone parent
0.066
523
0.245
2,763

one child
0.139
926
0.426
5,069

two children
0.183
1,568
0.506
8,126

three or more children
0.152
1,711
0.477
8,326

age of youngest child

0 to 4 years
0.187
897
0.479
4,059

5 to 9 years
0.163
1,917
0.490
7,846

10 to 14 years
0.151
1,550
0.460
8,274

15 to 17 years
0.092
969
0.416
10,658

age of oldest child

0 to 4 years
0.201
679
0.453
1,919

5 to 9 years
0.178
1,880
0.547
7,701

10 to 14 years
0.162
1,315
0.458
7,428

15 to 17 years
0.110
1,325
0.430
9,614

atlantic provinces
0.163
1,302
0.462
5,360

quebec
0.110
622
0.362
3,881

ontario
0.183
1,579
0.502
8,800

prairie provinces
0.164
1,842
0.493
7,190

british columbia
0.175
1,240
0.516
6,637

urban
0.165
1,374
0.483
7,296

rural
0.137
1,133
0.379
4,519

This image presents a table, and I'd like to know its row and column numbers. Output the final answer as JSON in the format {"row_number": "m", "column_number": "n"}.

There are 52 rows and 5 columns in the table. So, the final answer is {"row_number": "52", "column_number": "5"}.