That's the exchange rate GDP.
Tanzania's shilling dropped in value by 50% in 2015. Had it stayed at 1500/1USD, THE STORY WOULD DEFINATELY BE DIFFERENT.
However, the decline in our exchange rate doesn't mean that the price of goods and services has increased by 50%. It doesn't mean that rice is 50% more expensive than it as in early 2015. Matter of fact, the price of staple foods has dropped.
The import bill is stable and exports value is still the same (suprise,suprise).
That's why, our economies can be better compared using PPP. many UN Organizations use PPP GDP such as UNDP, UNIDO, ILO etc.. and if you use GDP by PPP Tanzania has a higher GDP than Kenya.
1. EGYPT
2. NIGERIA
3. SOUTH AFRICA
4. ALGERIA
5. MOROCCO
6. ETHIOPIA
7. SUDAN
8. ANGOLA
9. TANZANIA
10. KENYA
Source: World Bank (2017).