The data are not available for all countries and surely there are country-specific reports available for many regions. As far as I know, the following is one of the best existing global databases (it is interactive which means you can explore it by country, download data etc.)
The Forest Resource Assessment series published by FAO and the globalforestwatch database maybe a good starting points. See http://www.fao.org/forestry/fra/fra2015/en/ and/or http://www.globalforestwatch.org/.
I believe you may find a lot of interesting information in a recent paper that came out in Science:
Hansen MC, Potapov PV, Moore R, Hancher M, Turubanova SA, Tyukavina A, Thau D, Stehman SV, Goetz SJ, Loveland TR, Kommareddy A, Egorov A, Chini L, Justice CO & Townshend JRG (2013) High-Resolution Global Maps of 21st-Century Forest Cover Change. Science 342: 850-853. doi:10.1126/science.1244693.
this is the abstract:
Quantification of global forest change has been lacking despite the recognized importance of forest ecosystem services. In this study, Earth observation satellite data were used to map global forest loss (2.3 million square kilometers) and gain (0.8 million square kilometers) from 2000 to 2012 at a spatial resolution of 30 meters. The tropics were the only climate domain to exhibit a trend, with forest loss increasing by 2101 square kilometers per year. Brazil’s well-documented reduction in deforestation was offset by increasing forest loss in Indonesia, Malaysia, Paraguay, Bolivia, Zambia, Angola, and elsewhere. Intensive forestry practiced within subtropical forests resulted in the highest rates of forest change globally. Boreal forest loss due largely to fire and forestry was second to that in the tropics in absolute and proportional terms. These results depict a globally consistent and locally relevant record of forest change.
Hello Monsour, There is a comprehensive report on the current drivers of tropical deforestation published by Union of Concerned Scientists, which I think will be very useful to you and your research collaborators. The report is available (in PDF format) at www.ucsusa.org/whatsdrivingdeforestation. It can also be obtained from UCS Publications, 2 Brattle Square, Cambridge, MA 02138-3780. You can also email [email protected] or call (617) 547-5552 for further enquiries.
The FAO's State of the Forests use to be a very complete source of information, nevertheless they consider forest plantations like Eucalyptus and rubber as forests which from my perspective is not correct. Also there are many scientific papers per country. The ITTO is other good source as mentioned by Mr. Mario Guevara above.
http://www.fao.org/forestry/sofo/en/
http://www.botanik.uni-greifswald.de/fileadmin/laoek/pdf/paper_downloads/Archiv_2007_2_Scharnweber_et_al.pdf is an other interesting report related to your topic.