Study Table 1, which shows population trends of the Mumbai Urban Agglomeration (UA) in India, a major city in an emerging country, between 1981 and 2021.
Table 1: Population changes in Mumbai UA, 1981–2021
| Year | Total population of Mumbai UA (millions) | Percentage (%) of India's total urban population |
|---|---|---|
| 1981 | 8.2 | 5.1 |
| 1991 | 12.5 | 5.8 |
| 2001 | 16.4 | 5.7 |
| 2011 | 18.4 | 4.9 |
| 2021 | 21.0 | 4.4 |
Identify the increase in the total population of the Mumbai UA between 1981 and 2021.
8.2 million8.2\text{ million}8.2 million
12.5 million12.5\text{ million}12.5 million
12.8 million12.8\text{ million}12.8 million
21.0 million21.0\text{ million}21.0 million