Czech Republic of payments (Please check! Thank you!!!)

In the period 1993-1997, the current account deficit was determined by the development of the trade deficit.
In 1993, when trade had already run to a deficit, the current account balance was still zero. There was a slight decrease of both (of what?), in the amount of approximately 50% in 1994, followed by a dramatic fall to -$4mln and -$2.5mln for the trade deficit and the current account balance respectively in 1994.
From 1995 to 1997, the trade and current account balances gradually slipped, hitting a low of -$6mln and -$3.5mln respectively in 1997.

When you put extra information before the beginning of a sentence (From 1995 to 1997, ; During the meeting, ; Very quickly, ), you need to have a comma.