The on-time performance of New York City’s subways declined in 2014, fueled by overcrowding and delays related to unplanned work, according to a new audit by the state comptroller’s office.

In 2014, on-time performance—a measure of how frequently a train reaches the end of its line within five minutes of the scheduled time—fell to 74% on weekdays and 81% on weekends. Subways in 2013 reached their destination terminals on time 81% of the time on weekdays and 85% on weekends.

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