+59% in 4 years is equivalent to 12% every year. percentages compound exponentially.
59% from M1->M4 = 1.59^⅓ = 16.7% increase per generation
No one said "years" either...
59% from M1->M4 = 1.59^⅓ = 16.7% increase per generation
No one said "years" either...