Stats

	Average Rating per Console
#1	DS	80
#2	SNES	79
#3	Xbox	78
#4	Playstation 3	77
#5	Gamecube	76
#6	N64	72
#7	WiiU	72
#8	Dreamcast	70
#9	PC	70
#10	3DS	68
#11	Wii	68
#12	Game Boy Advance	67
#13	Playstation Portable	67
#14	Xbox 360	67
#15	Mega Drive	62
#16	Playstation	56
#17	Playstation 2	56
#18	Famicom	54
#19	Master System	52
#20	NES	51
#21	Game Boy	48
#22	Game Boy Colour	47
#23	Amstrad CPC	37
#24	Atari 2600	35
#25	Commodore Plus/4	23

Average Rating Per Year
1984	30.78
1985	46.03
1986	41.66
1987	50.58
1988	53.69
1989	47.59
1990	44.93
1991	64.83
1992	67.63
1993	60.74
1994	68.22
1995	58.93
1996	61.08
1997	62.63
1998	62.91
1999	69.06
2000	58.76
2001	60.00
2002	58.52
2003	55.73
2004	56.68
2005	68.72
2006	64.52
2007	65.11
2008	71.04
2009	71.76
2010	70.19
2011	72.85
2012	72.58
2013	72.23
2014	81.81
2015	74.38

As a graph it's easier to see that in general games are getting better and better if my reviews are to be believed.