NPPI sector	Period	Total
Total no. NPPIs in the directory	2001	158
Total no. NPPIs in the directory	1999	299
Total no. NPPIs in the directory	1997	399
Total no. NPPIs in the directory	1995	571
Total no. NPPIs in the directory	1993	174
Total no. NPPIs in the directory	1992	180
Total no. NPPIs in the directory	1991	191
Total no. NPPIs in the directory	1990	218
NPPIs that answered. Perform systematic R+D. Total	2001	71
NPPIs that answered. Perform systematic R+D. Total	1999	65
NPPIs that answered. Perform systematic R+D. Total	1997	59
NPPIs that answered. Perform systematic R+D. Total	1995	61
NPPIs that answered. Perform systematic R+D. Total	1993	65
NPPIs that answered. Perform systematic R+D. Total	1992	72
NPPIs that answered. Perform systematic R+D. Total	1991	80
NPPIs that answered. Perform systematic R+D. Total	1990	80
NPPIs that answered. Perform systematic R+D. %	2001	45
NPPIs that answered. Perform systematic R+D. %	1999	22
NPPIs that answered. Perform systematic R+D. %	1997	15
NPPIs that answered. Perform systematic R+D. %	1995	11
NPPIs that answered. Perform systematic R+D. %	1993	37
NPPIs that answered. Perform systematic R+D. %	1992	40
NPPIs that answered. Perform systematic R+D. %	1991	42
NPPIs that answered. Perform systematic R+D. %	1990	37
NPPIs that answered. Do not perform R+D. Total	2001	51
NPPIs that answered. Do not perform R+D. Total	1999	160
NPPIs that answered. Do not perform R+D. Total	1997	300
NPPIs that answered. Do not perform R+D. Total	1995	244
NPPIs that answered. Do not perform R+D. Total	1993	28
NPPIs that answered. Do not perform R+D. Total	1992	43
NPPIs that answered. Do not perform R+D. Total	1991	33
NPPIs that answered. Do not perform R+D. Total	1990	39
NPPIs that answered. Do not perform R+D. %	2001	32
NPPIs that answered. Do not perform R+D. %	1999	54
NPPIs that answered. Do not perform R+D. %	1997	75
NPPIs that answered. Do not perform R+D. %	1995	43
NPPIs that answered. Do not perform R+D. %	1993	16
NPPIs that answered. Do not perform R+D. %	1992	24
NPPIs that answered. Do not perform R+D. %	1991	17
NPPIs that answered. Do not perform R+D. %	1990	18
NPPIs that did not answer. Total	2001	22
NPPIs that did not answer. Total	1999	55
NPPIs that did not answer. Total	1997	22
NPPIs that did not answer. Total	1995	56
NPPIs that did not answer. Total	1993	71
NPPIs that did not answer. Total	1992	59
NPPIs that did not answer. Total	1991	60
NPPIs that did not answer. Total	1990	55
NPPIs that did not answer. %	2001	14
NPPIs that did not answer. %	1999	18
NPPIs that did not answer. %	1997	5
NPPIs that did not answer. %	1995	10
NPPIs that did not answer. %	1993	41
NPPIs that did not answer. %	1992	33
NPPIs that did not answer. %	1991	32
NPPIs that did not answer. %	1990	25
Other events. Total	2001	14
Other events. Total	1999	19
Other events. Total	1997	18
Other events. Total	1995	210
Other events. Total	1993	10
Other events. Total	1992	6
Other events. Total	1991	18
Other events. Total	1990	44
Other events. %	2001	9
Other events. %	1999	6
Other events. %	1997	5
Other events. %	1995	37
Other events. %	1993	6
Other events. %	1992	3
Other events. %	1991	9
Other events. %	1990	20