Phase	Solar cycle 21			Solar cycle 22			Solar cycle 23
Phase	Year	Winter	Summer	Year	Winter	Summer	Year	Winter	Summer
Minimum	1976	14	15	1985	16	21	1996	13	19
Increasing	1977	11	8	1986	25	29	1997	21	8
	1978	9	10	1987	30	8	1998	14	17
	1979	28	7	1988	4	7	1999	14	26
	1979	28	7	1989	18	10	2000	16	31
Maximum	1980	17	24	1990	20	10	2001	28	9
Decreasing	1981	12	6	1991	29	6	2002	1	17
	1982	17	1	1992	4	26	2003	12	19
	1983	4	9	1993	21	9	2004	22	4
	1984	21	24	1994	23	22	2005	21	7
	1984	21	24	1995	12	13	2005	21	7