3. Let’s revisit the data from Table 11.3, showing the following world economic growth rates for specific historical eras:

Years Growth rate AD 1–1800 0.02%

1800–1900 0.64%

1900–1950 1.04%

1950–2000 2.12%

Approximately how many years will it take for average real per capita GDP to double at each of those growth rates? l-58