\begin{tikzpicture}[scale=1.05]
\scriptsize
\begin{axis}
[
height = 0.650\linewidth,
width = 0.999\linewidth,
legend pos = south east,
xmin = 2010,
xmax = 2020,
xtick={2010,2012,...,2020},
minor xtick={2010,2012,...,2020},
grid=both,
grid style={line width=.1pt, draw=gray!10},
major grid style={line width=.2pt,draw=gray!50},
ymax = 6e6,
ymin = 1.4e6,
minor tick num = 1,
/pgf/number format/1000 sep={}
]
\addplot [fill=blue!30, draw = none, thick, mark = square*] coordinates {
(2010,1.45e6) (2011,1.55e6) (2012,1.8e6) (2013,2.2e6) (2014,2.7e6) (2015,3.2e6) (2016,3.75e6)
} \closedcycle;
\addplot [fill=blue!10, draw = none, thick, mark = square*] coordinates {
(2016,3.75e6) (2017,4.325e6) (2018,4.9e6) (2019,5.35e6) (2020,5.9e6)
} \closedcycle;
\legend{статистика, прогноз};
\end{axis}
\end{tikzpicture}