Current values and short term predictions of Delta T (2000 to 2024) Year 2001 2003 2005 2007 2009 2011 2013 2015 2017 2019 2021 2023 72.5 72.0 Key 72.0 71.5 IERS Bulletin B data 71.5 71.0 USNO MICA v2.2.2 data and predictions 71.0 70.5 IERS Sub-bureau RS&P-based predictions 70.5 70.0 70.0 69.5 69.5 69.0 69.0 68.5 68.5 68.0 68.0 67.5 67.5 67.0 67.0 66.5 66.5 66.0 66.0 65.5 65.5 65.0 65.0 64.5 64.5 64.0 64.0 2000 2002 2004 2006 2008 2010 2012 Year 2014 2016 2018 2020 2022 2024 Delta T (seconds) Delta T (seconds) 72.5