Year ended December 31, 2019 (Favorable) adverse development Catastrophe net claims and claim expenses Lar,e catastro4-e e:ents 2017 Large Loss Events $ (101,572) New Zealand Earthquake (2011) (7,497) Tohoku Earthquake and Tsunami (2011) (5,198) New Zealand Earthquake (2010) 47,071 2018 Large Loss Events 81,555 Other (31,916) "otal lar,e catastro4-e e:ents (17,557) !mall catastro4-e e:ents and attritional loss mo:ements Other small catastrophe events and attritional loss movements 5,339 "otal small catastro4-e e:ents and attritional loss mo:ements 5,339 Total catastrophe and attritional net claims and claim expenses (12,218) Actuarial assumption changes 9,245 Total net (favorable) adverse development of prior accident years net claims and claim expenses $ (2,973) The net favorable development of prior accident years net claims and claim expenses within the Company’s Property segment in 2019 of $3.0 million was comprised of net favorable development of $17.6 million related to large catastrophe events, net adverse development of $5.3 million related to small catastrophe events and attritional loss movements and $9.2 million of net adverse development associated with actuarial assumption changes. Included in net favorable development of prior accident years net claims and claim expenses from large events was $101.6 million of decreases in the net estimated ultimate losses associated with the 2017 Large Loss Events, partially offset by $81.6 million of increases in the net estimated ultimate losses associated with the 2018 Large Loss Events and $47.1 million of net increases in the estimated ultimate losses associated with the 2010 New Zealand Earthquake. asualt= and !4ecialt= !e,ment The following table details the development of the Company’s liability for unpaid claims and claim expenses for its Casualty and Specialty segment: Year ended December 31, 2021 2020 2019 (Favorable) adverse development (Favorable) adverse development (Favorable) adverse development Actuarial methods - actual reported claims less than expected claims $ (19,078) $ (29,280) $ (52,796) Actuarial assumption changes 2,981 2,517 28,914 Total net (favorable) adverse development of prior accident years net claims and claim expenses $ (16,097) $ (26,763) $ (23,882) The net favorable development of prior accident years net claims and claim expenses within the Company’s Casualty and Specialty segment in 2021, 2020, and 2019 was due to reported losses generally coming in lower than expected on attritional net claims and claim expenses across a number of lines of business, partially offset by net adverse development associated with certain actuarial assumption changes. F-53