Table 2.

Number of implants per 1000 inhabitants and distribution of population >60 years over provinces

	1986–1990a		1991–1995		1996–2000		2001–2005
	Number of implants per 1000 inhabitants per province (95 % CI)	% of population >60 yearsb	Number of implants per 1000 inhabitants per province (95 % CI)	% of population >60 years	Number of implants per 1000 inhabitants per province (95 % CI)	% of population >60 yearsb	Number of implants per 1000 inhabitants per province (95 % CI)	% of population >60 years
Drenthe	0.61 (0.54–0.69)	3.1	0.96 (0.87–1.05)	3.2	1.36 (1.25–1.47)	3.3	2.25 (2.12–2.38)	3.4
Flevoland	0.64 (0.54–0.76)	0.9	0.76 (0.65–0.87)	1.1	0.55 (0.47–0.63)	1.3	0.97 (0.87–1.07)	1.4
Friesland	1.17 (1.09–1.26)	4.3	1.15 (1.06–1.24)	4.2	1.34 (1.25–1.43)	4.1	1.73 (1.63–1.83)	4.2
Gelderland	0.87 (0.83–0.92)	11.9	0.93 (0.89–0.97)	12.0	1.07 (1.02–1.12)	12.1	1.31 (1.26–1.36)	12.2
Groningen	1.36 (1.26–1.46)	4.1	1.62 (1.51–1.73)	3.9	2.01 (1.89–2.13)	3.8	2.53 (2.40–2.66)	3.7
Limburg	1.47 (1.40–1.55)	7.3	1.52 (1.45–1.59)	7.5	1.60 (1.53–1.67)	7.8	2.15 (2.07–2.24)	7.9
Noord-Brabant	1.13 (1.09–1.13)	12.8	1.24 (1.19–1.29)	13.4	1.44 (1.39–1.49)	14.2	1.76 (1.71–1.81)	14.7
Noord-Holland	1.09 (1.05–1.13)	16.7	1.20 (1.16–1.24)	16.2	1.46 (1.41–1.51)	15.7	2.01 (1.96–2.06)	15.5
Overijssel	1.36 (1.29–1.44)	6.8	1.66 (1.58–1.74)	6.8	1.87 (1.79–1.95)	6.8	2.37 (2.28–2.46)	6.8
Utrecht	1.13 (1.07–1.20)	6.3	1.28 (1.21–1.35)	6.4	1.46 (1.39–1.53)	6.4	1.72 (1.64–1.80)	6.4
Zeeland	1.41 (1.30–1.54)	2.8	1.45 (1.33–1.57)	2.8	1.58 (1.45–1.71)	2.8	1.90 (1.76–2.04)	2.8
Zuid-Holland	1.34 (1.30–1.38)	22.9	1.45 (1.41–1.49)	22.3	1.47 (1.43–1.51)	21.7	2.04 (1.99–2.09)	21.0

^a1984 and 1985 excluded to create equal time periods, additionally no population data are available for these years for Flevoland

^bCalculated over the years 1988–1990, no population data available for 1986 and 1987