is there any changes in the trend travelling before and now?

Answer 1

Of course there is a change in travel trend.
Those are always changing.
At the moment more people travel all over the world than ever before.
With wars in different places tourism in the affected areas will suffer.
Yugoslavia used to be a popular tourist destination, then it had a war, now most of the countries of former Yugoslavia are getting tourists again, if building up slowly.

If you want a more specific answer you will have to narrow your question more.