Year,continent,study_count
2005,Africa,0
2005,Asia,0
2005,Europe,0
2005,North America,1
2005,Oceania,0
2005,South America,0
2006,Africa,0
2006,Asia,0
2006,Europe,0
2006,North America,0
2006,Oceania,0
2006,South America,0
2007,Africa,0
2007,Asia,0
2007,Europe,0
2007,North America,0
2007,Oceania,0
2007,South America,0
2008,Africa,0
2008,Asia,0
2008,Europe,0
2008,North America,0
2008,Oceania,0
2008,South America,0
2009,Africa,0
2009,Asia,0
2009,Europe,0
2009,North America,1
2009,Oceania,1
2009,South America,0
2010,Africa,0
2010,Asia,0
2010,Europe,0
2010,North America,1
2010,Oceania,0
2010,South America,0
2011,Africa,0
2011,Asia,0
2011,Europe,2
2011,North America,0
2011,Oceania,0
2011,South America,0
2012,Africa,0
2012,Asia,0
2012,Europe,0
2012,North America,0
2012,Oceania,0
2012,South America,0
2013,Africa,0
2013,Asia,2
2013,Europe,3
2013,North America,1
2013,Oceania,1
2013,South America,1
2014,Africa,0
2014,Asia,0
2014,Europe,0
2014,North America,3
2014,Oceania,0
2014,South America,0
2015,Africa,0
2015,Asia,0
2015,Europe,1
2015,North America,3
2015,Oceania,0
2015,South America,0
2016,Africa,0
2016,Asia,0
2016,Europe,0
2016,North America,7
2016,Oceania,2
2016,South America,0
2017,Africa,0
2017,Asia,0
2017,Europe,2
2017,North America,3
2017,Oceania,0
2017,South America,0
2018,Africa,0
2018,Asia,0
2018,Europe,1
2018,North America,3
2018,Oceania,1
2018,South America,3
2019,Africa,0
2019,Asia,0
2019,Europe,5
2019,North America,5
2019,Oceania,0
2019,South America,0
2020,Africa,0
2020,Asia,1
2020,Europe,4
2020,North America,5
2020,Oceania,4
2020,South America,2
2021,Africa,0
2021,Asia,1
2021,Europe,8
2021,North America,15
2021,Oceania,13
2021,South America,2
2022,Africa,0
2022,Asia,4
2022,Europe,14
2022,North America,27
2022,Oceania,47
2022,South America,17
2023,Africa,1
2023,Asia,8
2023,Europe,11
2023,North America,29
2023,Oceania,31
2023,South America,9