Progress in each of these dimensions varies by region and by country, with no single trend across the Commonwealth. It is notable that progress in parliamentary representation, and women's leadership in the corporate sector seem to be benefiting from the presence of positive action and quotas, both voluntary and legislated. The report found that during the last 20 years (1997 to 2017), women’s lower house representation in Africa has improved markedly, with the exception - barring Cameroon - of West Africa. However, on the election of women to cabinet, although progress has been reasonable in South Africa and Rwanda in Africa.