"...we can see that total number of visitors..." Instead say "...we can see that the total number of visitors..." Knowing where to put "the" and "a" are some of the trickiest things to master when learning English. Mostly, you did a really good job here, but in this sentence, you need to add a "the" "... has increased with 18.000 per year..." Instead of "with" say "by" If you are saying something about how something increased by a number, then you will almost always use the preposition "by" and not "with." Later on, you say "decreased by" which is correct. This is the same idea. "...The situation with regard to visitor satisfaction..." Instead of "regard" say "regards" If you are saying "with" or "in" before "regards," then "regards" should always have an "s." "...has increased with 20% and 10% respectively..." Again, instead of "with" say "by" "...from 10% to 5% and now is equal to the number of people who hasn't participated..." I would switch the "now" and the "is" so that the sentence would be "...from 10% to 5% and is now equal..." It should also be "haven't" not "hasn't." "Hasn't" refers to one person, and you are referring to a group of people, so you should say "haven't." "...As a conclusion..." Change this to "In conclusion" "...the number of museum's visitors..." Take away the possessive. Just say "museum visitors."

These are really too long to be a 'question' , and are more appropriate for the 'notebook' section of this website. A previous one I answered because it was relatively correct, with only a few minor corrections. This one is a lot less correct and/or is not very clear.