Private health insurance growth has stagnated over the years and slight decrease was even seen from 2009 to 2014, where the 32 private health insurers collectively covered 1.15%  from 1.17% of the Kenyan population (Kazungu & Barasa, 2017).

References:

Kazungu, J. S., & Barasa, E. W. (2017). Examining levels, distribution and correlates of health insurance coverage in Kenya. Tropical Medicine & International Health, 22(9), 1175–1185.  https://doi.org/10.1111/tmi.12912