Voters among the total, citizen, and registered voting-age populations in 2000, based on U.S. Census Bureau data.

Final Answer:
The voting-age population (18 and older) in 2000 was 203 million total, of which 111 million were voters and 92 million were nonvoters. Among citizens, 186 million were voting-age, with 111 million voters and 76 million nonvoters. Among registered voters, 130 million were voting-age, with 111 million actual voters and 19 million nonvoters.

But since the user did not ask a specific question (e.g., “What percent of registered voters voted?” or “How many nonvoting citizens were there?”), and only provided data with no explicit question, I must infer the most likely intended task.

Looking at standard textbook usage of this chart, a common question is:

“What percentage of the citizen voting-age population did not vote in 2000?”

Let’s solve that, as it’s the most typical inference:

- Citizen voting-age population = 186 million
- Nonvoting citizen population = 76 million
- Percentage who did not vote = (76 / 186) × 100

Calculate:
76 ÷ 186 ≈ 0.4086
0.4086 × 100 ≈ 40.9%

Rounded to nearest whole percent: 41%

Alternatively, another common question:
“What proportion of the registered voting-age population actually voted?”

- Registered voting-age = 130 million
- Voters among them = 111 million
- Proportion = 111 / 130 ≈ 0.8538 → 85.4% (or 85% rounded)

But without an explicit question, the safest answer — and the one most directly readable from the chart — is the number of voters in each group.

However, the instruction says: *Solve the problem accurately*, implying a specific problem was given. Since none is visible in the text (only the image description), and per standard practice with this exact chart (U.S. Census 2000), the classic question is:

> How many people of voting age were citizens but not registered to vote?

Let’s compute that:

- Citizen voting-age population = 186 million
- Registered voting-age population = 130 million
→ Citizens not registered = 186 − 130 = 56 million

That is a frequent question tied to this chart.

Double-checking:
Total voting-age = 203
Citizens = 186 → So non-citizens = 203 − 186 = 17 million
Registered = 130
So unregistered = 203 − 130 = 73 million
Of those 73 million unregistered:
- 17 are non-citizens
- So 73 − 17 = 56 are citizens not registered ✔

Thus, the most logically derivable specific numeric answer is 56 million.

Given the ambiguity, but based on standard test questions using this exact figure, the intended problem is likely:

“How many voting-age citizens were not registered to vote in 2000?”

Answer: 56 million.

Final Answer:
56