還查了另一個資料就沒這麼誇張:(只有 2010 年美國)
大概是室內空調普及了 http://www.statisticbrain.com/birth-month-statistics/ Total number of US births in 20104,000,279
August 362,798
September 350,711
July 347,934
October 347,354
June 336,251
March 335,786
December 335,111
May 334,437
November 330,832
January 319,297
April 308,809
February 299,235
還查了另一個資料就沒這麼誇張:(只有 2010 年美國)
大概是室內空調普及了 http://www.statisticbrain.com/birth-month-statistics/ Total number of US births in 20104,000,279
August 362,798
September 350,711
July 347,934
October 347,354
June 336,251
March 335,786
December 335,111
May 334,437
November 330,832
January 319,297
April 308,809
February 299,235