this table displays the results of volunteer rate and average number of volunteer hours. the information is grouped by household income (appearing as row headers), percent and mean number of hours (annually) (appearing as column headers)
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

Give a concise answer to this question supported by the table contents. Answers must be within a JSON object e.g. {"answer": ["YOUR ANSWER"]}. List multiple answers with commas inside the list object. 'this table displays the results of volunteer rate and average number of volunteer hours. the information is grouped by household income (appearing as row headers), percent and mean number of hours (annually) (appearing as column headers)' is the caption of the table. Answer the following table-based question: How many hours do the volunteers with a household income of less than $20,000 contribute over the course of a year?

{"answer": ["182.0"]}