It can be seen that over 50% of them went to cinema in 2000, a 10% (a ten point) increase on the figure of 1990, although it touched the lowest point of just under 40% in the middle of this period. To be honest, you can't construct a sentence like this because the different clauses don't really connect, especially that third one. What period? Why "although"? A 10% increase is not a 10 point increase. You probably mean a ten point increase.

Statistics for 1990 - 2010 It was found that over 50% of the studied group preferred to watch movies in a theater in 2000. This is an increase of 10% when compared to the study done in 1990. It is interesting to note that the lowest point of the study appears in the middle of this time period, with just under 40% in 2000.

Here is a suggested version for references. --- Between the period of 1990 and 2000 It was found that in 2000, over 50% of the respondents (or: the studied cases) would like to (or: preferred to) watch movies in the cinema, a 10% increase in comparsion to the (same / similar) figures in 1990, although the number reached the lowest point to barely under 40% within the given period. === Good day. / 祝　是日安好。