Table:
period

1981 to 2000
2000 to 2008
1981 to 2009

percent

value-added growth (log), annual average
3.22
0.39
2.31

percentage points

contribution

labour input
0.08
0.84
0.32

produced capital input
2.45
4.64
3.16

natural capital input
0.43
0.16
0.34

multifactor productiivty
0.26
-5.25
-1.51

percent

multifactor productivity growth (log), annual average before adding natural capital
-0.04
-6.96
-2.27

I'd like to know the total number of rows and columns in the provided table. Output the final answer as JSON in the format {"row_number": "m", "column_number": "n"}.

This table has 12 rows and 4 columns. Thus, the final answer is {"row_number": "12", "column_number": "4"}.