Firsthand Bitcoin · Data · Bitcoin miners
The number of unspent transaction outputs, the pieces every bitcoin is stored in.
Unspent outputs (UTXO set) opened 2015 at 16.08M (January 5, 2015) and closed at 33.38M (December 31, 2015), up 107.6%. The high was 35.52M on September 7, 2015 and the low 16.08M on January 5, 2015.
| Month | Month end |
|---|---|
| January 2015 | 16.63M |
| February 2015 | 17.72M |
| March 2015 | 17.98M |
| April 2015 | 18.81M |
| May 2015 | 19.84M |
| June 2015 | 20.82M |
| July 2015 | 25.16M |
| August 2015 | 33.41M |
| September 2015 | 33.58M |
| October 2015 | 32.46M |
| November 2015 | 32.70M |
| December 2015 | 33.38M |
Bitcoin is not stored in accounts but in unspent outputs, each one a lump of coins that a future transaction will spend. The count grows with adoption and jumps during inscription waves, when many small outputs are created.
Other years: 2026 · 2025 · 2024 · 2023 · 2022 · 2021 · 2020 · 2019 · 2018 · 2017 · 2016 · 2014 · 2013
Also in 2015: Bitcoin price · Distance from the all-time high · Network hashrate · Mining difficulty · Difficulty adjustments · Fees paid to miners · Transactions per day · Hashprice · Miner revenue · Bitmain releases and the bitcoin price · Break-even electricity price · What a bitcoin costs us to mine, against the market