jan	feb	mar	apr	may	jun	jul	aug	sep	oct	nov	dec	total	N
1986						5	14			6	10		35	10.2
1987									17				17	5.1
1992										16			16	3.6
1997								23	21	6	13	9	72	21.4
1998	8	1		23	17	26	18	25	9	25	26	14	192	64.4
1999	15	12	17	20	9	29	28	11	12	17	21	10	201	66.9
2000	15	17	20	20	25	15	14	23	18	26	16	17	226	79.5
2001	22	20	16	23	23	11		24	14	24	10	10	197	64.2
2002	22	10	22	19	15	27	29	31	30	28	18	29	280	88.3
2003	12												12	3.0
2006		22	27	30	31	30	25	24	29	31	23	15	287	90.4
2007	9	22	31	29	29	29	30	28	23	31	19	31	311	97.4
2008	28	29	27	30	29	29	31	30	30	31	29	30	353	108.0
2009	30	28	28	30	31	30	31	29	28	31	29	31	356	114.3
2010	29	27	31	30	30	30	29	30	27	31	28	31	353	113.5
2011	30	25	26	25	31	28	30	31	30	31	29	30	346	110.3
2012	30	29	31	30	29	30	31	31	30	31	29	31	362	114.8
2013	30	28	31	30	30	29	31	31	27	28	30	28	353	103.1
2014	30	26	2				10	30	29	31	30	31	219	58.0
2015	30	28	5	7	29	30	28	26	29	17			229	63.1
2016			8	27	30	27	30	27	21	23	23	24	242	64.5
2017	13	3	1	15	2						19	27	80	16.1
2018	27	20	1		26	20	29	31	30	31	30	30	275	80.0
2019	23							4	30	28	30	31	146	39.0
2020	31	28	27	6		1			3	6	6	3	111	21.2
2022			1		19	21	13	12	28	30	9	31	164	42.6
2023	5	26	25	6	28	27	30	21	23	24	24	24	263	64.1
2024	16	11	27	7	11	22	30	24	28	22	29	22	249	61.4
2025	11		5										16	3.5
sum:	466	412	409	407	474	496	511	547	566	605	530	539	5962	1771.6

Isolated nights

2. Data from other sites / special conditions:
BUE Buenos Aires (34.6°S, 58.4°W),
ARE El Arenosillo  (37.1°N, 6.7°W),
LEO El Leoncito     (31.8°S, 69.3°W)

(total amount of data in these campaigns: 25.6 thousand)

	jan	feb	mar	apr	may	jun	jul	aug	sep	oct	nov	dec	Site
1984						5							LEO/* different acquis. proc.
1988												5	BUE
1990	13	26	10										ARE/*Spain
1994										2	22	6	BUE
sum:	13	26	10			5				2	22	11	total: 89