How many zoos have exactly 16 bears? ∣ ​

00
10
20
30
40
50
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0
8
1
1
1
0
​

8
3
7
4
3
​

0
6
0
5
0
​

6
7
​

7
0
​A zookeeper published the following stem-and-leaf plot showing the number of bears at each major zoo in the country:
\left| \quad \begin{matrix} 0 \vphantom{\Large{0}} \\ 1 \vphantom{\Large{0}} \\ 2 \vphantom{\Large{0}} \\ 3 \vphantom{\Large{0}} \\ 4 \vphantom{\Large{0}} \\ 5 \vphantom{\Large{0}} \\ \end{matrix} \quad \right| \quad \begin{matrix} \vphantom{\Large{0}} \\ 8&8& \vphantom{\Large{0}} \\ 1&3&6&6&7&7& ;9& \vphantom{\Large{0}} \\ 1&7& \vphantom{\Large{0}} \\ 1&4&5&7& \vphantom{\Large{0}} \\ 0&3& \vphantom{\Large{0}} \\ \end{matrix}

7

9