year,per1000,severe_per1000,mean_share4
1992,999.0036410155482,174.95325723282818,0.07602783197801298
1993,999.3564007478011,92.53527026060662,0.06997142481344742
1994,998.1057876423233,86.31019786283433,0.06774495724665522
1995,997.3784996006309,70.86243267044873,0.06696575333447506
1996,999.0107290009382,134.96920001631787,0.07281303713334002
1997,933.0008295525537,211.3617975686941,0.07172585236925318
1998,768.5147257608651,5.7346495719493715,0.040365436981046394
1999,794.9174755293443,4.7303108489986485,0.03522423901012861
2000,759.1432198877831,24.88020641356432,0.040803490046709676
2001,770.0558729099779,35.056081390985284,0.04330999614444764
2002,733.3750859865091,47.895768950399905,0.04570316722151149
2003,361.3988572368151,9.968347926172564,0.03941926343394678
2004,462.88120349930506,17.108167770419428,0.039807230854763793
2005,470.0862562341591,18.51851851851852,0.04000602470166874
2006,261.9681534555248,5.437967084365588,0.033574412592444876
2007,520.0774467296264,63.96564331249549,0.05990418365466344
2008,352.49343563860765,91.12457472133393,0.09270947361118635
2009,101.25117745832821,20.262522013351354,0.08926025111692933
2010,197.76592265554737,34.43095413294089,0.06301994818518791
2011,213.26956095168015,37.34363502575423,0.07992625857855959
2012,129.3247854410092,14.083341950160273,0.06419765940347752
2013,152.8085507959954,5.375020515345478,0.038961049446650804
2014,196.9165435745938,11.488593467913999,0.03612635871747971
2015,139.32915591596017,7.187615186140804,0.036447747342567935
2016,137.34567901234567,5.488103998037772,0.038401505178698905
2017,168.71061585748208,4.430555412781793,0.03430257222315641
2018,207.21119681974068,20.164986251145738,0.037506289343544184
2019,119.29673395699984,3.990234695552273,0.035292657684469604
2020,193.81434883317516,83.67261558555525,0.06407701892754324
2021,135.55719074482872,5.161066143406099,0.04015892932862111
2022,119.76811117506784,7.287640819011594,0.041849671502877946
2023,109.61905948820207,3.0429544699235627,0.035217522313106674
2024,135.25862513537206,4.29065030168635,0.03827934299647837
2025,156.5505118395202,10.360872712232446,0.037979056104708524