Table:
type of formal employer support
2013
2010

percentage

any type of support
55
57

use of facilities or equipment
27
30

paid time off or time to spend volunteering
20
20

approval to change work hours or reduce work activities
34
35

recognition or letter of thanks
19
24

other
3
4

donated prizes, gift certificates
1
2

donated financially to the organization
1
1

donated t-shirts or company goods
1
1

sponsored an event, paid entry fee or membership fee
1
1

provided transportation
0
f

Statement: the prevalence of formal recognition or letter of thanks in 2013 is less than that in 2010.
Question: in which year is the prevalence of formal recognition or letter of thanks less , 2010 or 2013?
Answer: [2013.0]