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78 Maternity and Obstetrics Groups 1. Nulliparous, single cephalic, >=37 weeks, in spontaneous labour 2. Nulliparous, single cephalic, >=37 weeks, induced and CS before labour 2a. Nulliparous, single cephalic, >=37 weeks, induced 2b. Nulliparous, single cephalic, >=37 weeks, CS before labour 3. Multiparous (excluding prev. CS), single cephalic, >=37 weeks, in spontaneous labour 4. Multiparous (excluding prev. CS), single cephalic, >=37 weeks, induced and CS before labour 4a. Multiparous (excluding prev. CS), single cephalic, >=37 weeks, induced 4b. Multiparous (excluding prev. CS), single cephalic, >=37 weeks, CS before labour 5. Previous CS, single cephalic, >= 37 weeks 6. All nulliparous breeches 7. All multiparous breeches (including prev. CS) 8. All multiple pregnancies (including prev. CS) 9. All abnormal lies (including prev. CS) 10. All single cephalic, <= 36 weeks (including prev. CS Table IV: The absolute contribution of each group to the overall caesarean section rate percentages) Year 1974 1984 1994 2014 2015 2016 2017 2018 2019 2020 Totals 5.0% 4.3% 8.8% 23.5% 25.9% 26.0% 27.2% 28.8% 30.3% 31.4% 1 0.7% 0.8% 1.7% 1.9% 2.0% 1.7% 1.8% 2.0% 1.6% 1.6% 2 0.9% 0.5% 0.4% 5.9% 6.5% 6.4% 6.7% 7.0% 8.9% 8.9% 2a 4.5% 5.1% 4.9% 5.1% 4.8% 6.2% 6.2% 2b 1.4% 1.5% 1.5% 1.7% 2.2% 2.6% 2.7% 3 0.3% 0.2% 0.4% 0.4% 0.5% 0.3% 0.3% 0.5% 0.3% 0.2% 4 1.2% 0.2% 0.6% 1.5% 1.6% 1.6% 1.6% 2.4% 1.9% 2.4% 4a 0.6% 0.6% 0.5% 0.6% 1.0% 0.6% 0.7% 4b 1.0% 1.0% 1.1% 1.0% 1.4% 1.3% 1.7% 5 0.4% 1.0% 1.7% 7.4% 9.2% 9.3% 8.9% 9.5% 10.4% 10.9% 6 0.3% 0.3% 1.0% 2.2% 2.3% 1.8% 2.6% 2.2% 2.2% 2.0% 7 0.1% 0.2% 0.6% 1.1% 1.4% 1.3% 1.5% 1.4% 1.8% 1.7% 8 0.1% 0.2% 0.4% 1.4% 1.4% 1.4% 1.5% 1.2% 1.1% 1.3% 9 0.3% 0.3% 0.2% 0.3% 0.4% 0.3% 0.4% 0.5% 0.4% 0.6% 10 0.7% 0.5% 0.8% 1.4% 1.7% 1.9% 1.9% 2.1% 1.7% 1.9% 2020 | NMH Annual Rep t