library(tidyverse)

df <- tribble(
  ~year, ~country, ~series1, ~series2,
  #--|--|--|----
  2003, "USA", 8, 5,
  2004, "USA", 9, 6,
  2005, "USA", 11, 7,
  2006, "USA", 10, 8,
  2007, "USA", 11, 4,
  2008, "USA", 14, 10,
  2009, "USA", 16, 12,
  2010, "USA", 12, 8,
  2011, "USA", 12, 13,
  2012, "USA", 13, 10,
  2013, "USA", 11, 5,
  2005, "FRA", 5, 6,
  2006, "FRA", 6, 8,
  2007, "FRA", 5, 7,
  2008, "FRA", 4, 8,
  2009, "FRA", 9, 11,
  2010, "FRA", 7, 9,
  2011, "FRA", 14, 11,
  2012, "FRA", 7, 11,
  2013, "FRA", 6, 6,
  2014, "FRA", 5, 7,
  2015, "FRA", 4, 5
)

ggplot(df, aes(x = year)) +
  geom_line(aes(y = series1, color = "First series")) +
  geom_line(aes(y = series2, color = "Second series")) +
  facet_wrap(~country) +
  annotate("text", x = 2014, y = 13, label = "First series") +
  annotate("text", x = 2014, y = 8, label = "Second series")