Number of clinical trials in Bulgaria
Bulgaria: Number of clinical trials was 16 trials in 2024. ◆ Volatile
Number of clinical trials in Bulgaria, 2004–2024
Source: ClinicalTrials.gov (2025) – with major processing by Our World in Data. Measured in trials.
Analysis
In 2024, number of clinical trials in Bulgaria stood at 16 trials.
Compared with earlier readings it is down 33.3% on the previous year and up 23.1% over ten years.
Over the whole period, number of clinical trials in Bulgaria peaked at 24 trials in 2023 and was at its lowest, 1 trials, in 2004.
That places Bulgaria 61st out of 153 countries with data for 2024, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Number of clinical trials in Bulgaria, year by year
| Year | trials | Change |
|---|---|---|
| 2004 | 1 trials | — |
| 2005 | 2 trials | +100.0% |
| 2006 | 7 trials | +250.0% |
| 2007 | 8 trials | +14.3% |
| 2008 | 6 trials | -25.0% |
| 2009 | 5 trials | -16.7% |
| 2010 | 4 trials | -20.0% |
| 2011 | 4 trials | +0.0% |
| 2012 | 11 trials | +175.0% |
| 2013 | 14 trials | +27.3% |
| 2014 | 13 trials | -7.1% |
| 2015 | 13 trials | +0.0% |
| 2016 | 8 trials | -38.5% |
| 2017 | 14 trials | +75.0% |
| 2018 | 12 trials | -14.3% |
| 2019 | 13 trials | +8.3% |
| 2020 | 13 trials | +0.0% |
| 2021 | 18 trials | +38.5% |
| 2022 | 21 trials | +16.7% |
| 2023 | 24 trials | +14.3% |
| 2024 | 16 trials | -33.3% |
Bulgaria compared with similar countries
- Bulgaria's 16 trials is below the median for high income countries, which is 46.5 trials, 34% of the median. (54 countries reporting)
- Bulgaria's 16 trials is below the median for Europe & Central Asia, which is 20.5 trials, 78% of the median. (46 countries reporting)
Biggest year-on-year movements
Years where Number of clinical trials in Bulgaria changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2006 | +250.0% | 2 trials | 7 trials |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 4.83 trials | 1 trials | 8 trials | 6 |
| 2010s | 10.6 trials | 4 trials | 14 trials | 10 |
| 2020s | 18.4 trials | 13 trials | 24 trials | 5 |
Countries ranked near Bulgaria
- 58 Lebanon 19 trials compare
- 58 Philippines 19 trials compare
- 58 Tunisia 19 trials compare
- 62 Syria 15 trials compare
- 63 Burkina Faso 13 trials compare
- 63 Kazakhstan 13 trials compare
- 63 Nigeria 13 trials compare
More reference data data for Bulgaria
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.3067 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.2728 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 1.73 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 0.2506 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 1.73 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 1.03 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.608 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 1.02 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 7.74 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 1.36 (2050)
Frequently asked questions
- What is number of clinical trials in Bulgaria?
- Number of clinical trials in Bulgaria was 16 trials in 2024, according to ClinicalTrials.gov (2025) – with major processing by Our World in Data.
- What is the highest number of clinical trials recorded in Bulgaria?
- The highest recorded value was 24 trials in 2023.
- What is the lowest number of clinical trials recorded in Bulgaria?
- The lowest recorded value was 1 trials in 2004.
- How does Bulgaria rank for number of clinical trials?
- Bulgaria ranks 61st out of 153 countries with data for 2024.
- Is number of clinical trials rising or falling in Bulgaria?
- Over the last ten years it is up 23.1%. The long-run trend across the full record is volatile.
- Where does this Bulgaria data come from?
- The figures come from ClinicalTrials.gov (2025) – with major processing by Our World in Data, published as part of Number of clinical trials. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 21 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Annual number of completed clinical trials registered in the ClinicalTrials.gov database for each country. Registration in the ClinicalTrials database is mandatory for trials in the United States, but voluntary for other countries.