A zookeeper created the following stem-and-leaf plot showing the number of sloths at each major zoo in the country:
∣
0
1
2
3
4

∣
3
6
7
7
0
4
0
1
1
2
4
7
9
9
1
2
3
5
7

∣
∣
∣
∣
∣
∣
∣
∣
∣
∣
∣
​

00
10
20
30
40
​

∣
∣
∣
∣
∣
∣
∣
∣
∣
∣
∣
​

3
6
0
0
1
​

0
7
4
1
2
​

7
0
1
3
​

0
2
5
​

4
7
​

7
0
​

9
​

9
​

0
​

Key:
4
 
∣
 
1
=
41
4∣1=414, vertical bar, 1, equals, 41 sloths
How many zoos have exactly
17
1717 sloths?