Table:
jurisdiction
total custody
total community services
total correctional services

number
rate
percent change in rate from 2016/2017
number
rate
percent change in rate from 2016/2017
number
rate
percent change in rate from 2016/2017
percent change in rate from 2013/2014

newfoundland and labrador
11
3
12
176
56
-8
187
59
-7
-29

prince edward island
4
4
2
52
53
-21
56
57
-20
-54

nova scotia
22
4
-3
.
..
..
..
..
..
..

new brunswick
15
3
-11
.
..
..
..
..
..
..

ontario
275
3
-6
2,478
27
-6
2,753
30
-6
-42

manitoba
185
19
-14
1,204
123
-6
1,389
141
-7
-28

saskatchewan
133
16
-15
1,007
121
2
1,140
137
0
-10

alberta
91
3
-21
914
32
-10
1,005
35
-11
..

british columbia
49
2
-6
417
14
-15
467
16
-14
-41

northwest territories
4
14
-13
17
55
-9
21
69
-10
-46

nunavut
4
9
-48
30
78
-16
34
87
-21
-38

total-all jurisdictions
792
4
-12
6,296
36
-6
7,052
41
-7
-34

Statement: the youth incarceration rate decreased 21% in alberta from 2016/2017.
Question: how much did the youth incarceration rate decrease in alberta from 2016/2017?
Answer: [21]