1.   Arguments in favour of a more substantial increase in the supply of medical staff come from several sources.

2.   He negotiated a substantial increase in pay for the workers.

3.   Maize consumption rose, populations grew and there was a substantial increase in the complexity of the culture.

4.   New companies were set up by public subscription, and there was a substantial increase in the number of films produced.

5.   Small wonder so little value has been obtained, despite the substantial increase in resources.

6.   There has been a substantial increase in self-employment during that period.

7.   Will we see a substantial increase in prices from year to year?

8.   A substantial increase in foreign investment was seen by the government and international agencies alike as vital.