法人会員 法人/開業 2010 35,801 21,527 489 2.3% 2011 36,850 21,983 542 2.5% 2012 37,784 22,469 599 2.7% 2013 38,445 22,815 660 2.9% 2014 39,331 23,241 752 3.2% 2015 40,110 23,480 960 4.1% 2016 40,535 23,573 1,226 5.2% 2017 41,187 23,725 1,471 6.2% 2018 42,056 23,962 1,708 7.1% 2019 42,887 24,158 1,934 8.0% 2020 43,474 24,423 2,120 8.7% 2021 44,203 24,429 2,405 9.8% 2022 44,870 24,515 2,688 11.0% 2023 45,386 24,549 2,913 11.9%