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The New York Islanders had their best power-play percentage in a season in 1977-78, at 31.4 percent.

when did the islanders have their best power play percentage in a season
1977-78Islanders1978-79Islanders1980-81Islanders1981-82Islanders1982-83Islanders1984-85Islanders1986-87Islanders1989-90Islanders1979-80Islanders2017-18Islanders2021-22Islanders1985-86Islanders1983-84Islanders1988-89Islanders1987-88Islanders1991-92Islanders1992-93Islanders2023-24Islanders1993-94Islanders2012-13Islanders2020-21Islanders1995-96Islanders31.431.229.327.826.025.125.123.623.423.222.822.722.522.522.522.121.620.720.119.919.018.8
TEAMPP%SEASONGPWLTOTLPTSPTS%SOWSOLGGADIFFPK%S/GPS%SA/GPSV%
IslandersIslanders31.41977-7880481715111.69433421012483.531.1313.428.20.907
IslandersIslanders31.21978-7980511514116.72535821414480.228.7615.628.86.907
IslandersIslanders29.31980-8180481814110.6883552609579.330.2114.730.23.892
IslandersIslanders27.81981-8280541610118.73838525013579.930.8615.630.08.896
IslandersIslanders26.01982-838042261296.6003022267683.730.3612.429.96.906
IslandersIslanders25.11984-85804034686.5383453123382.230.1914.332.41.880
IslandersIslanders25.11986-878035331282.513279281-278.031.0111.227.84.874
IslandersIslanders23.61989-908031381173.456281288-776.529.4911.933.53.893
IslandersIslanders23.41979-808039281391.5692812473477.627.7112.729.95.897
IslandersIslanders23.22017-188235371080.48833261293-3273.231.3710.135.59.900
IslandersIslanders22.82021-228237351084.51226229231-283.728.879.732.55.913
IslandersIslanders22.71985-868039291290.5633272844378.429.4013.933.24.893
IslandersIslanders22.51983-848050264104.6503572698881.530.2814.733.39.899
IslandersIslanders22.51988-89802847561.381265325-6073.630.3610.930.79.868
IslandersIslanders22.51987-888039311088.5503082674177.430.2112.731.61.894
IslandersIslanders22.11991-928034351179.494291299-876.527.8313.132.88.886
IslandersIslanders21.61992-93844037787.5183352973879.531.0212.929.42.880
IslandersIslanders20.72023-248239271694.57315245258-1370.630.129.932.76.904
IslandersIslanders20.11993-948436361284.5002822641881.129.8911.230.49.897
IslandersIslanders19.92012-13482417755.57343135136-180.330.949.128.17.899
IslandersIslanders19.02020-21563217771.634431521252783.228.989.428.39.921
IslandersIslanders18.81995-968222501054.329229315-8678.328.179.932.04.880
IslandersIslanders18.72014-158247287101.616762452242178.033.798.828.30.903
IslandersIslanders18.52011-128234371179.48274196251-5580.529.398.130.11.898
IslandersIslanders18.32015-1682452710100.610552272111684.529.419.430.43.915
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StatMuse has team, season-level data for power-play percentage going back to the 1977-78 season.

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