回答

1. You(S) want(V) (to learn some information)(O:不定詞・名詞的用法) (about cellphones and public phones)(M).
2. You(S) are listening to(V) a presentation(O) (about them)(M).
※You(S) are listening(V) (to a presentation)(M) (about them)(M) の分析も可能ですが、listen to …を1つの他動詞句と考える方が実用的だと思います。
3. The graph(S) shows(V) the changes(O) (in the total numbers)(M) (of cellphones and public phones)(M)
4. (in Japan)(M) (from 1990)(M) (to 2017)(M).
5. <As(接続詞) you(S1) can see(V1)>, (before 1993)(M), cellphones(S2) were(V2) not very common(C2).
6. (From 1999)(M) (to 2008)(M), the total number(S) (of cellphones)(M) increased(V) (by more than 100%)(M).
7. (In 2011)(M), there(M:副詞) were(V) more than 120 million cellphones(S).
8. This(S1) means(V1) <that(接続詞) the number(S2) (of cellphones)(M) was(V2) greater(C2) (than the population)(M) (of Japan)(M)>.
9. Even today(M), the number(S) is increasing(V) (year by year)(M:副詞句).
10. (On the other hand)(M),
11. (from 1990)(M) (to 2017)(M), the number(S) (of public phones)(M) decreases(V) (by more than 80%)(M).
12. Will the number(S) (of public phones)(M) continue(V) to decrease(O:不定詞・名詞的用法) (year by year)(M:副詞句)?

参考にしてください。

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