Number of monthly dental claims and its percentage change between the three emergency declaration periods in 2020–2021 and the corresponding periods in 2019
| Emergency declarations | First state of emergency April 7–May 25, 2020 | Second state of emergency January 8–March 21, 2021 | |||||
| Year | April | May | Year | January | February | March | |
| N (% change*) | N (% change*) | ||||||
| Number of claims | 2019 | 12 370 900 | 11 989 548 | 2019 | 11 512 284 | 11 969 166 | 13 606 207 |
| 2020 | 9 614 252 (−22.3) | 9 551 896 (−20.3) | 2021 | 11 971 588 (4.0) | 12 285 721 (2.6) | 14 042 447 (3.2) | |
| Cost per day | 2019 | 7100 | 7069 | 2019 | 6998 | 7143 | 7152 |
| 2020 | 7569 (6.6) | 7542 (6.7) | 2021 | 7583 (8.4) | 7736 (8.3) | 7785 (8.9) | |
| Days per claim | 2019 | 1.64 | 1.60 | 2019 | 1.61 | 1.63 | 1.66 |
| 2020 | 1.72 (4.7) | 1.70 (6.0) | 2021 | 1.56 (−3.2) | 1.57 (−3.7) | 1.60 (−3.2) | |
| Emergency declarations | Third state of emergency † April 25–September 30, 2021 | ||||||
| Year | April | May | June | July | August | September | |
| N (% change*) | |||||||
| Number of claims | 2019 | 12 370 900 | 11 989 548 | 13 333 412 | 13 564 244 | 12 892 495 | 12 264 480 |
| 2021 | 12 827 678 (3.7) | 12 386 327 (3.3) | 13 470 781 (1.0) | 13 542 092 (−0.2) | 13 011 979 (0.9) | 12 734 323 (3.8) | |
| Cost per day | 2019 | 7100 | 7069 | 7130 | 7118 | 7185 | 7163 |
| 2021 | 7790 (9.7) | 7776 (10.0) | 7817 (9.6) | 7828 (10.0) | 7891 (9.8) | 7849 (9.6) | |
| Days per claim | 2019 | 1.64 | 1.60 | 1.63 | 1.66 | 1.58 | 1.60 |
| 2021 | 1.59 (−3.0) | 1.55 (−2.9) | 1.59 (−2.5) | 1.57 (−5.8) | 1.52 (−3.9) | 1.55 (−3.3) | |
*The percentage change was calculated as follows: (①–②)/② × 100, where ① is the number of claims in a month during the state of emergency and ② is that in the corresponding month in 2019.
†No prefecture was under a state of emergency for the entire period.