Census officials expect that proportion to increase to 50 percent by the year 2000.
Analysis by decade shows that this proportion did not increase over the period, or indeed in the early 5th century.
By the same year the proportion of organic land increased to 20%.
The proportion of those tested who learned their results also increased from 69% to 99.7%.
After 27 January 2017, the proportion will increase to 40%.
By 1928, the proportion of women working in the workforce had increased to 24 percent.
Thus the proportion of the person's income that is paid as tax has increased.
The proportion of the age group 15-64 also slightly increased to 68% in 2009.
In the last 10 years, the proportion of women among the department's 860 professional staff members has increased, and it now stands at 58 percent.
And the proportion of people without any coverage at all may increase, he said.