Gaborone
Demographics
Table:
Historical population
Year	Pop.	±% p.a.
1964	3,855	—
1971	17,718	+24.34%
1981	59,657	+12.91%
1991	133,468	+8.39%
2001	186,007	+3.37%
2006	191,776	+0.61%
2011	231,626	+3.85%
Sources:[3][5][8][24][25]

Studying the data table for 'Gaborone' titled 'Demographics', give a one-line statement limited to the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.