Sono 5'191 i bambini venuti al mondo lo scorso anno a Zurigo, che sta conoscendo un vero e proprio baby boom. Le nascite sono aumentate del 45% negli ultimi 15 anni e nessuna altra città svizzera ha conosciuto un fenomeno analogo. In Europa solo a Oslo, Stoccolma ed Amsterdam possono vantare tassi di fertilità superiori.
Fra i motivi, hanno spiegato oggi (mercoledì) le autorità, c'è anche la diminuita tendenza delle famiglie a trasferirsi in campagna. Le statistiche mostrano pure come la frequenza delle gravidanze dipenda ancora dal reddito: a differenza di quanto accadeva in passato, però, non sono i poveri ad avere la prole più numerosa, ma quanti guadagnano oltre i 125'000 franchi annui. E mentre i bambini aumentano, diminuiscono gli anziani: nella categoria di età fra i 75 e i 79 anni c'è stata nel medesimo arco di tempo una flessione di un quarto.
A fine 2015 Zurigo aveva 410'404 abitanti (+5'621 in un anno). Di questi, 29'371 avevano meno di sei anni.
pon/ATS
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