Table 1. Mean and median life expectancies (in years, with 95% confidence intervals) for bottlenose dolphins in zoological care as calculated by Kaplan-Meier analyses.

Time period	Median LE (CI)	Mean LE (CI)
1974–1982	9.0 (5.9–11.4)	10.6 (8.8–12.5)
1983–1992	15.3 (12.5–17.1)	17.3 (15.2–19.4)
1993–2002	18.2 (14.1–20.3)	20.3 (18.0–22.5)
2003–2012	29.2 (25.0–32.9)	28.2 (25.3–31.0)