year,date,percentage
2007,2007-03-31,87.5
2008,2008-03-31,84.85
2009,2009-03-31,85.32
2010,2010-03-31,85.21
2011,2011-03-31,84.59
2012,2012-03-31,81.99
2013,2013-03-31,77.65
2014,2014-03-31,75.13
2015,2015-03-31,73.73
2016,2016-03-31,71.07
2017,2017-03-31,77.3
2018,2018-03-31,78
2019,2019-03-31,69.95
2020,2020-03-31,66.64
2021,2021-03-31,64.19
2022,2022-03-31,62.02
2023,2023-03-31,56.03
2024,2024-03-31,54.56
2025,2025-03-31,60.60