Complex sentence: In 1999 the system was extended to 44% of the population, however, due to lobbying from group like PourEva (1) and increasing doubt in the system, new test and more control were added.
Split into simpler sentences: In 1999 the system was extended to 44% of the population. However, due to lobbying from groups like PourEva (1) and increasing doubt about the system, new tests were done and more controls were added.