The given chart demonstrates information about the noise complaints by Environment Health organizations during the spanning from 1980 to 1996, distributed to 4 categories.
Overall, it is noticeable that there is an upward trend in the number of complaints made for road works, traffic noise, and factories, whereas domestic begs to exceptionally decline.
In detail, the statistics of criticism in road works and traffic noise tend to stay similar. At the former period, the figure for road works started at 500, approximately double the data for street noise, after that both of them maintained the same level in 4 years. Surprisingly, the 2 figures witnessed a marginal decline before dramatically enjoying an increasing period, when the number of road works reached a plateau of 1200, nearly twice as much as traffic noise in 1996.
Also noticeable was the number of dissatisfaction in factories’ domains, which started at 400 in 1980, then moderately increased to roughly 700 in the final year. Additionally, in 1980, the feedback coming from domestic activities tended to dominate the period, accounting for more than 600. However, the constant figure from 1982 to 1996 made household activities to be the least reason to complain, which bottomed out at approximately 100.