Guys please check this short IELTS writing exercise for grammar mistakes. N7 On the following chart we can see that the number of minutes of telephone calls has drastically changed in the period from from 1995 until 2002. The changes also occurred in general structure of the 3 main types of calls in the UK. First, we can see that from 1995 to 1999 the number of local - fixed line telephone calls was increasing. After the peak in 1999, the number was constantly decreasing and in 2002 was slightly more that 70 billions. On the other hand, the number of minutes of telephone calls in the two remained categories was constantly increasing. The time spent using mobile phones in 2002 was still less than the time spent on national and international - fixed line calls, with 45 and 61 billions respectfully. Nevertheless, it is obvious from the chart that the increase in mobile calls was much more significant.In conclusion, it is clear that the difference between the 3 represented categories of calls became less significant while the total number of minutes of telephone calls in the UK has increased.