8.69.59.59.310.09.99.89.39.29.78.99.59.58.739.49.09.18.910.0
9.19.49.59.69.79.69.69.69.69.69.69.59.59.439.49.49.49.29.4
厚生労働省「人口動態調査」
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H15H16H17H18H19H20H21H22H23H24H25H26H27H28H29H30R1R2R3
4.05.06.08.011.04.05.04.05.05.010.06.07.05.03.05.04.010.05.0
54.053.055.053.054.056.058.045.050.051.067.053.047.038.050.033.037.049.046.0
65.072.083.067.081.092.084.087.082.095.075.074.084.063.073.071.070.067.079.0
176.0211.0192.0213.0198.0232.0209.0193.0185.0223.0179.0217.0218.0154.0178.0171.0151.0151.0186.0
1099.01201.01157.01158.01293.01245.01228.01179.01157.01171.01094.01122.01122.01040.01066.01001.0948.0883.0955.0
1398.01542.01493.01499.01637.01629.01584.01508.01479.01545.01425.01472.01478.01300.01370.01281.01210.01160.01271.0
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123.0130.0144.0128.0146.0152.0147.0136.0137.0151.0152.0133.0138.0106.0126.0109.0111.0126.0130.0
厚生労働省「人口動態調査」
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H15H16H17H18H19H20H21H22H23H24H25H26H27H28H29H30R1R2R3
7.58.09.27.919.09.29.18.48.59.49.58.58.97.18.67.68.39.710.3
7.57.67.77.77.87.67.57.57.67.77.77.77.57.27.37.37.47.47.5
厚生労働省「人口動態調査」
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（令和3年〔2021年〕）
総数0.5kg未満0.5～1.0kg1.0～1.5kg1.5～2.0kg2.0～2.5kg
12670.05.046.079.0186.0955.0
0.039463299131807420.363062352012628260.62352012628255731.4680347277032367.537490134175218
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2.5～3.0kg3.0～3.5kg3.5～4.0kg4.0～4.5kg4.5～5.0kg5.0kg～不詳平均体重
4650.05251.01378.0113.05.01.01.03.01kg
36.700868192580941.4443567482241510.8760852407261250.89187056037884770.039463299131807420.0078926598263614830.007892659826361483
厚生労働省「人口動態調査」