It was close to 15%-20%.
Think about how all Muslim majority countries gradually become devoid of any minorities. Almost all of them when they started off with 0% Muslims. Almost all of them.
Think about what is going on there.
Can you spot a pattern?
Country/Region[3] Muslim population Muslim percentage (%) of total population
Morocco 32,381,000 99.9
Somalia 9,231,000 98.6
Tunisia 10,349,000 99.8
Afghanistan 29,047,000 99.8
Iran 74,819,000 99.6
Western Sahara 528,000 99.6
Mauritania 3,338,000 99.2
Yemen 24,023,000 99
Tajikistan 7,006,000 99
Iraq 31,108,000 98.9
Jordan 6,397,000 98.8
Mayotte 197,000 98.8
Turkey 74,660,000 98.6
Azerbaijan 8,795,000 98.4
Maldives 309,000 98.4
Niger 15,627,000 98.3
Comoros 679,000 98.3
Algeria 34,780,000 98.2
Palestinian territories 4,298,000 97.5
Saudi Arabia 25,493,000 97.1
Djibouti 853,000 97
Libya 6,325,000 96.6
Uzbekistan 26,833,000 96.5
Pakistan 178,097,000 96.4