I found this info about the odds
Albinism can affect people of all ethnic backgrounds and has been extensively studied. Approximately one in 17,000 people have one of the types of albinism . This suggests that about 1 in 70 people carry a gene for OCA.
OCA1 has a prevalence of approximately 1 per 40,000  in most populations but is very uncommon among African-Americans
In contrast, OCA2 is the most common type of albinism in African Black OCA patients. The overall prevalence of OCA2 is estimated to be 1:36,000 in the USA, but is about 1:10,000 among African Americans . It affects 1 in 3,900 of the population in some parts of the southern part of Africa .
OCA3 or Rufous oculocutaneous albinism has been reported to affect 1:8,500 individuals in Africa, whereas it is very rare in Caucasians and Asiatic populations .
Recently, mutations in a fourth gene were shown to be the cause of albinism, OCA4,  and were reported to explain the disease in approximately 5–8% of German patients with albinism  but 18% of Japanese patients .