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?